Monthly Archives: December 2015

Polish and Symmetry

Craftsmanship in the GIA Diamond Cut Grading System: Evaluating Finish in Standard Round Brilliant Diamonds

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In the Gemological Institute of America (GIA) Diamond Cut Grading System for standard round brilliant diamonds, the aspect of craftsmanship — i.e., the care that went into the crafting of a polished diamond, as seen in its finish — plays an important role in the overall cut grade along with the other aspects of face-up appearance and design (see figure 1). The two categories that define finish — polish and symmetry — have been part of GIA’s International Diamond Grading System™ since its inception in the mid-1950s and are listed on each GIA Diamond Grading Report and Diamond Dossier®. It is important to note that with the introduction of the new cut grading system, the criteria for determining polish and symmetry remain the same.The following is a review of the criteria and the methods used for assessing them,and will explain their role in the new cut grading system.This article expands on the GIA’s course material for assessing polish and symmetry, describes the guidelines used by the GIA Laboratory in evaluating finish and presents specific examples of the different polish and symmetry categories. In the GIA Diamond Grading System,“polish”refers to the quality of a diamond’s surface condition as a result of the polishing process (see figure 2) or to blemishes created after the cutting process, often referred to as “wear and tear” (see figure 3). Polish features are located on the surface and do not visibly penetrate into the diamond at 10X magnification. Polish is assessed on a scale consisting of excellent, very good, good, fair and poor. “Symmetry” refers to the exactness of the shape of a diamond,and the symmetrical arrangement and even placement of the facets (see figure 4). Symmetry is also assessed on a scale ranging from excellent to poor. In the GIA Diamond Cut Grading System for standard round brilliant diamonds,on the GIA D-to-Z color scale and Flawless-to-I3 clarity scale, finish is factored into the final overall cut grade as follows:

• To qualify for an excellent cut grade,both polish and symmetry must be very good or excellent.

• To qualify for a very good cut grade,both polish and symmetry must be at least good.

• To qualify for a good cut grade,both polish and symmetry must be at least fair.

• To qualify for a fair cut grade,both polish and symmetry must be at least fair.

• A poor cut grade is assigned when either polish or symmetry is poor.

To determine the relationship between finish and overall cut quality, GIA conducted extensive observation testing using standardized lighting and viewing conditions. Observations of diamonds with comparable proportions, but differing in their polish and symmetry categories,were analyzed to determine the effects of finish on overall cut appearance. In this way, GIA researchers found that a one grade difference between the other aspects of a diamond’s cut grade and its polish and symmetry assessments did not significantly lower a trained observer’s assessment of faceup appearance,and could not be discerned reliably with the unaided eye — e.g., polish and/or symmetry descriptions of very good did not cause observers to lower their assessment of a diamond that would otherwise receive an overall cut grade of excellent.

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POLISH A number of features are considered in the evaluation of polish. Examples and definitions of these are provided in table 1,Polish Features,on page 83. Diamond graders consider the amount and visibility of the polish features present. The general appearances of GIA’s five polish categories are described here.

Excellent: ranges from no polish features to a few minute polish features that can be viewed with difficulty face-up at 10X magnification.* Very Good: minor polish features are seen face-up at 10X magnification.

Very Good: minor polish features are seen face-up at 10X magnification.

Good: noticeable polish features are seen face-up at 10X magnification. The luster of the diamond may be affected when viewed with the unaided eye.

Fair: obvious heavy polish features are seen face-up at 10X magnification. The luster of the diamond is affected when viewed with the unaided eye.

Poor: prominent heavy polish features are seen faceup at 10X magnification. The luster of the diamond is significantly affected when viewed with the unaided eye.

As with all other aspects of diamond grading, standard methodology and a controlled environment are used to evaluate polish consistently, with the final determination based on an objective consensus of independent grader opinions. The following steps are performed at 10X magnification with either a fully corrected loupe or gemological microscope under darkfield illumination to assess the polish:

• The diamond is first examined face-up,girdle-to-girdle to gain an initial impression of the polish.

• The diamond is then examined one section at a time, through both the crown and pavilion, to locate and identify the specific polish features present.

• The diamond is again examined face-up,girdle-to-girdle, and this time viewed in at least four different positions with a loupe; some features may be more or less apparent depending on the orientation of the diamond.

• A visual polish description is assigned that considers the diamond’s overall face-up appearance as well as polish features seen in any view. Emphasis is placed on the diamond’s face-up appearance with a 10X loupe.

SYMMETRY As with polish, a number of features are considered in the evaluation of symmetry;these are defined and illustrated in tables 2 and 3 on pages 84-85. Symmetry features can be subdivided into two categories:proportion related (see table 2,Proportion-Related Symmetry Features) and facet related (see table 3, Facet-Related Symmetry Features). Due to a polished diamond’s three-dimensional nature,the presence of one symmetry feature may result in others.Graders consider the extent and visual appearance of any symmetry features present. The general appearances of GIA’s five symmetry categories are described here:

Excellent: ranges from no symmetry features to minute symmetry features that can be viewed with difficulty face-up at 10X magnification.

Very Good: minor symmetry features are seen faceup at 10X magnification.

Good: noticeable symmetry features are seen face-up at 10X magnification.The diamond’s overall appearance may be affected when viewed with the unaided eye.

Fair: obvious symmetry features are seen face-up at 10X magnification.The diamond’s overall appearance is often affected when viewed with the unaided eye.

Poor: prominent symmetry features are seen face-up at 10X magnification.The diamond’s overall appearance is significantly affected when viewed with the unaided eye.

The following steps are performed at 10X magnification with either a fully corrected loupe or gemological microscope under darkfield illumination to determine the symmetry of a polished diamond.Again, the final result is an objective consensus of independent grader opinions. • The diamond is first examined face-up,girdle-to-girdle in order to gain an initial impression of the symmetry. • The diamond is then rotated in profile view to reveal any symmetry features that are best seen in this position — such as non-pointing,misalignment,wavy girdle, girdle thickness variation,table and girdle not parallel, crown angle variation and pavilion angle variation. • The diamond is again examined face-up,girdle-to-girdle, and this time viewed in at least four different positions with a loupe;some features may be more or less apparent depending on the orientation of the diamond. • A visual symmetry description is assigned that considers the diamond’s face-up appearance as well as symmetry features seen in profile view.Emphasis is placed on the diamond’s face-up appearance with a 10X loupe.

 

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Table 4,Examples of GIA Polish Categories,page 86,and table 5, Examples of GIA Symmetry Categories, page 87, provide examples and typical grade-setting characteristics for each polish and symmetry category using the established methods of the GIA Laboratory.

CONCLUSION The aspect of craftsmanship has always been part of GIA’s International Diamond Grading System as it is practiced in the GIA Laboratory and taught in GIA’s educational courses.

Thank you to the Rapaport Diamond Report for this article.

A unique, personal jeweler who works nationwide, Keith Saxe is GIA and FIT trained and has been a trusted high end diamond jewelry specialist for 27 years. He is the founder and president ​ of NYC Wholesale Diamonds located at 47 West 47th Street Suite 3A in the New York City Diamond District. His website is www.NYCWD.com and he authors a blog www.NYCDiamondBlog.com. ​Keith has recently been named to The Diamond Council of America, is a member of the Jewelers Board of Trade, and Jewelers of America​. He offers GIA Certified Ideal Cut Diamonds,​ and state of the art fine jewelry designs at low wholesale prices. Keith has been named the N.Y. Diamond District’s Favorite Jeweler by the N.Y. Post’s Savvy Shopper column, had his diamond education articles published, been recommended in the New York Times, national gift reporter Robyn Spizman’s ‘Perfect Present Guide’ and ‘The GIFTionary’, as well as having his Diamond Halo Engagement Ring design featured on ‘The Knot.’

 

 

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For Investors, the Brilliance of Diamonds is All in Their Color

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If there is a holiday gift almost guaranteed to make a recipient swoon with joy, it is a diamond. But while such stones remain appealing as jewelry, the value of certain colored diamonds has increased while traditional white diamonds have fallen.

Diamond dealers are talking about pink, blue and red diamonds as investments, citing a recent track record of double-digit returns. This new interest in such rare gemstones can make a holiday gift 10 to 20 times more expensive than a similar, high-quality white diamond. Yet there are others in the trade who question whether these stones will pay the dividends people imagine in the Christmases to come.

“Fancy colored diamonds are the flavor of the year – they’re hot, they’re sexy, they’re great,” said Martin Rapaport, chairman of the Rapaport Group, which is considered a primary source of diamond pricing information.

“If someone said, ‘I want to buy something great for my wife,’ I’d say, great, buy fancy colored diamonds; you’re a billionaire,” he added. “But anyone who wants to invest in the flavor of the month shouldn’t do it.”

Understanding the lust for colored diamonds begins with understanding the broader forces pushing and pulling diamond prices.

The white diamonds that adorn engagement rings and will dangle from ears and wrap around bracelets this holiday season have fallen in value over the last year. Prices for one-carat diamonds have dropped 7.15 percent as of Dec. 1, according to an index Mr. Rapaport developed.

Mr. Rapaport said demand for white diamonds has dropped globally because of a slowing Chinese economy, currency devaluation in Russia and low oil prices in the Middle East. Yet on the supply side, the cost of rough, white diamonds has stayed high, which has hurt the rest of the diamond trade’s ability to make a profit.

During the same time, colored diamonds have surged in value. Buyers have sought them out for their beauty, extreme rarity and investment potential.

The best-known pink diamonds, for example, are from the Argyle diamond mine in Western Australia. That mine, which supplies 90 to 95 percent of the world’s pink diamonds, will be exhausted by 2020, and the scarcity has driven up prices.

“Argyle pink diamonds outperform any other,” said Leibish Polnauer, president of Leibish & Company, a colored-diamond dealer. “They’re less and less available and more and more in demand. Fifteen years ago we bought Argyle pink diamonds for $10,000 a carat. Today it’s $150,000, $200,000, $250,000 a carat.”

Dealers say wealthy buyers in volatile economies view rare, colored diamonds as a hedge against economic uncertainty. A diamond can also be a discreet way to put a tremendous amount of money into something smaller than an aspirin tablet.

“You can buy a large house for $1 million, or 1/16 ounce — or less than half a carat — of a red diamond,” said Yaniv Marcus, founder of the Diamond Investment and Intelligence Center. “A one-carat red diamond could be valued at $2.5 million.”

At the highest end, colored diamond prices have reached a level that rival rare art works like Amedeo Modigliani’s “Nu Couché,” which sold for $170.4 million at the fall auctions.

“It’s all about rarity,” said Frank Everett, vice president and sales director in the jewelry department at Sotheby’s. “The best ones stand out like a great piece of art.”

In the last year, Sotheby’s has sold two well-known blue diamonds for record-setting prices. A 9.75-carat blue diamond that belonged to the socialite Bunny Mellon sold in November 2014 for $32.6 million – or $3.3 million a carat. Last month, the auction house sold the 12-carat Blue Moon for $48.5 million – or just over $4 million a carat.

Those prices far outstrip the 100-carat white diamond Sotheby’s sold in April for $22 million — or $2.2 million a carat.

More broadly, a one-carat fancy pink diamond in a cushion cut is 11.50 times more expensive than a one-carat cushion-cut white diamond that has been judged to be internally flawless and carries the highest color rating, said Eden Rachminov, head of the advisory board of the Fancy Color Resource Foundation. A blue diamond is 20.8 times more expensive than a similar white diamond.

But it is not so simple to jump into the trade just based on the soaring prices. Investors also need to understand the very different ways white and colored diamonds are judged.

With white diamonds, it is the widely known measures of color, cut, clarity and carat weight that drive prices. But investing in white diamonds is a lot like picking quality stocks. There are established measures of quality, relatively transparent pricing, knowable transaction costs and liquidity, at least in smaller carat sizes.

Mr. Rapaport views investments in white diamonds as a way to capitalize on the growth of the global middle class who will buy them as gifts and drive prices back up.

In the world of colored diamonds, what determines value is more subjective. The range of prices for any given colored diamond can range wildly, corresponding not only to the rarity of their colors but also to the vividness of the color itself. (The so-called chocolate diamonds that mall jewelers are advertising are not considered investments; until fairly recently, they were used for industrial purposes because they are so common.)

“It’s the strength of the color,” said Jordan Fine, president of JFine Inc., a dealer that specializes in colored diamonds. “A light yellow could be $3,000 a carat and a vivid yellow could be $15,000 a carat. A one-carat light pink could be $75,000 to $700,000 a carat for a vivid pink.”

He added, “It’s hard to fathom how expensive and rare that little stone is.”

Yet discerning the vividness of a colored diamond can be more art than science. If white diamonds are likened to stocks, colored diamonds are private equity investments, with all the risk and reward such forays entail.

“Colored diamonds don’t have a price list or somebody managing the value,” Mr. Marcus said. “It’s a true supply-and-demand free trade. It’s like real estate. Its value is what someone will pay for it.”

Mr. Rachminov said the prices of yellows have been stable, tending to track the stock market, but the pinks and blues have soared in value, which has made some industry experts like Mr. Rapaport skeptical. (Red diamonds are at the top but they are exceedingly rare.) “There’s more interest from high-net-worth individuals, just like there’s more demand for art and wine and luxury items in general,” Mr. Rachminov said.

Colored-diamond dealers talk of the stones as a store of value, and they have shown to be over decades. But they are not the easiest investments to sell.

“The approach should be long term,” Mr. Marcus said. “It’s not a trading commodity first of all because of liquidity. The return is exponential over time.”

He also divides colored diamonds into two categories: jewelry and investments. This is by quality but also by the color itself. He said there are not enough orange, green, violet, and purple diamonds to create the liquidity for an investment market. Therefore, most investors focus on blue, pink and red diamonds.

Yet that line between jewelry and investment can get blurred. Sam, who owns a medical business in New Jersey but asked that his last name be withheld for security concerns, has amassed a collection of dozens of colored diamonds. He bought his first pink diamond in a ring as a gift for his wife in 2005. Then he bought a green diamond and realized that the stones could be used to finance his children’s college education.

“I put some money into that green diamond and that started a collecting bug,” he said. “Then it became trying to find some of the best examples of different colors of vivid colored diamonds.”

Mr. Fine, who sold Sam many of his stones, said some of his pink diamonds had doubled in value in 10 years. But Sam said he also was aware that his timing was right.

In 2007, he bought a half-carat vivid pink diamond in the Argyle tender — an annual private auction of the best pink diamonds from the mine. But this year, he bid four times the price for a smaller pink diamond of lesser quality and lost.

Mr. Fine, who sold Sam many of his stones, said some of his pink diamonds had doubled in value in 10 years. But Sam said he also was aware that his timing was right.

In 2007, he bought a half-carat vivid pink diamond in the Argyle tender — an annual private auction of the best pink diamonds from the mine. But this year, he bid four times the price for a smaller pink diamond of lesser quality and lost.

Still, as with any thing of beauty, it can be a lot harder to look rationally at sparkling colored diamonds than a list of company names in a securities portfolio.

Sam said he had amassed a collection valued at $6 million of 41 colored diamonds in almost every different hue but can’t bear to sell them. “Now I keep them securely in a vault and I go down and look at them,” he said. “It’s a lot of concentrated wealth in a thing of great beauty.”

This well written and informative article is authored by Paul Sullivan for The  New York Times.

A unique, personal jeweler who works nationwide, Keith Saxe is GIA and FIT trained and has been a trusted high end diamond jewelry specialist for 27 years. He is the founder and president ​ of NYC Wholesale Diamonds located at 47 West 47th Street Suite 3A in the New York City Diamond District. His website is www.NYCWD.com and he authors a blog www.NYCDiamondBlog.com. ​Keith has recently been named to The Diamond Council of America, is a member of the Jewelers Board of Trade, and Jewelers of America​. He offers GIA Certified Ideal Cut Diamonds,​ and state of the art fine jewelry designs at low wholesale prices. Keith has been named the N.Y. Diamond District’s Favorite Jeweler by the N.Y. Post’s Savvy Shopper column, had his diamond education articles published, been recommended in the New York Times, national gift reporter Robyn Spizman’s ‘Perfect Present Guide’ and ‘The GIFTionary’, as well as having his Diamond Halo Engagement Ring design featured on ‘The Knot.’

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Thank you Carolina B. of Houston, TX for your Kind Review!

Thank you to the lovely couple, Carolina and Mark, for our recent Yelp review. We wish you both an eternity of love and success!

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“My (now) fiancé spent a good part of a year researching and scouring the earth to finally find the perfect diamond to place on my finger! Searching the west, gulf, and east coasts, he looked to Keith Saxe to find a 4 carat fancy yellow radiant radiant diamond for his price range. He was the only one who could do it, and he did! I actually inadvertently met him a few weeks before I was proposed to, on a sort of impromptu meeting, and thought he was a genuinely nice guy. Mark (my love) stated Keith was the best at communication, and extremely easy to work with. Being out of state also saved him money on taxes, so not a bad idea if you’re coming from elsewhere. Mark had so many ideas on how to set it, and finally went with Keith’s suggestion. He trusted his judgment to assure this gorgeous diamond got the pedestal it deserved to sit on! Love my ring Keith!”

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This is what She Wants

THE FOLLOWING DESIGNS ARE WHAT WOMEN WANT, AND ARE ASKING FOR THIS SEASON. THESE STYLES ARE ALL IN STOCK, AND CAN BE CUSTOMIZED TO YOUR SPECIFIC NEEDS AND DESIRES.

OUR FREE FEDEX SHIPPING AND INSURANCE OFFER THROUGHOUT THE UNITED STATES CONTINUES THROUGH THE END OF 2015.

DIAMOND STUD EARRINGS

Our most requested diamond earrings include GIA certified brilliant ideal cut round studs in sizes from half a carat to three carats each, priced $1,500 and up

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SOLITAIRE DIAMOND NECKLACE DESIGNS
From the classic​ one to two carat white gold floating solitaire to modern white gold Italian semi and full bezel designs, with select diamond halos
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TENNIS BRACELETS IN DIAMOND AND SAPPHIRE
The straight line, sleek all diamond design, as well as alternating sapphire and diamond combinations from 5 to 12 carats are red hot
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STACKABLE BAND RINGS
For use as wedding bands, or in various combinations as her mood dictates. Thin diamond, rose gold, emerald, ruby, and sapphire bands offer complete versatility that the active woman desires
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DIAMOND HOOPS ARE VERY MUCH IN
Compact, close to the ear hoops and huggies are now being joined in popularity by larger one inch and up, diamond inside and out designs for all occasions
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A diamond certificate is an expert third party opinion. It states the quality of every aspect of a diamond. Without this certification you are left to trust the jeweler’s estimates. This can cause a potential conflict because the jeweler is the one trying to sell you the diamond.

Buying a certified diamond will usually cost a little more because the diamond had to go through a lab of gemologists that have carefully graded every aspect of the diamond. This is a very minor expense that is worth many times its cost for your protection. There are thousands of labs that grade diamonds. They all offer their certifications in wonderful glossy folders, but you only should consider diamonds graded by the GIA, which is the Gemological Institute of America.

Established in 1931, GIA is the world’s foremost authority on diamonds. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in diamonds, gems and jewelry. The world leader in gemological research, GIA’s breakthrough discoveries deepen our understanding of diamonds and gemstones from around the world. There are only two GIA locations in the United States, here in the New York Diamond District, and in Carlsbad, California.

The most important factor which should be your primary criteria is a laboratory that is not connected in any way with buying or selling diamonds. This is necessary in offering an unbiased, legitimate appraisal. GIA meets that requirement. They have also begun to laser inscribe the GIA Report number on the girdle of the diamond. Laser inscription allows you to personalize, and easily identify your diamond.

Here at NYC Wholesale Diamonds we educate first to inform and protect the consumer. If you decide to view our extensive inventory of GIA Certified Diamonds obtained directly from the source in Antwerp, you will find we sell ideal cut diamonds at wholesale prices that are all GIA certified. It would be our pleasure to meet with you to review and explain all the GIA certificate’s grades in extreme detail.

If the diamond that you are looking at has a certificate from a different lab, I would highly advise that you do some research immediately. This will in most cases lead you to reconsider your decision.

Feel free to call NYC Wholesale Diamonds to set up an in-person Diamond Education Appointment with our founder and president, Keith J. Saxe, by calling (212) 719-2214. If you are searching for an engagement ring we can help you find the Perfect Diamond, Ring and Wedding Bands. Our personal consultation includes an informative lesson on the quality, pricing, and certification of diamonds. Locating the perfect, ideal cut diamond for maximum spectacular brilliance. Designing the perfect setting for the diamond. Advice on immediate protection by the least expensive insurance options. As well as advice on your actual proposal as its romantic significance will last a lifetime.

A unique, personal jeweler who works nationwide, Keith Saxe is GIA and FIT trained and has been a trusted high end diamond jewelry specialist for 27 years. He is the founder and president ​ of NYC Wholesale Diamonds located at 47 West 47th Street Suite 3A in the New York City Diamond District. His website is www.NYCWD.com and he authors a blog www.NYCDiamondBlog.com. ​Keith has recently been named to The Diamond Council of America, is a member of the Jewelers Board of Trade, and Jewelers of America​. He offers GIA Certified Ideal Cut Diamonds,​ and state of the art fine jewelry designs at low wholesale prices. Keith has been named the N.Y. Diamond District’s Favorite Jeweler by the N.Y. Post’s Savvy Shopper column, had his diamond education articles published, been recommended in the New York Times, national gift reporter Robyn Spizman’s ‘Perfect Present Guide’ and ‘The GIFTionary’, as well as having his Diamond Halo Engagement Ring design featured on ‘The Knot.’

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