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A MAGNIFICENT FANCY VIVID YELLOW DIAMOND RING THE FANCY VIVID YELLOW SQUARE EMERALD-CUT DIAMON...

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A MAGNIFICENT FANCY VIVID YELLOW DIAMOND RING THE FANCY VIVID YELLOW SQUARE EMERALD-CUT DIAMON...
A MAGNIFICENT FANCY VIVID YELLOW DIAMOND RING
THE FANCY VIVID YELLOW SQUARE EMERALD-CUT DIAMOND WEIGHING 25.33 CARATS, ACCENTED WITH TRIANGULAR SHAPED DIAMOND SHOULDERS
ACCOMPANIED BY A GIA REPORT
NO. 11788843 DATED FEBRUARY 7, 2002, STATING FANCY VIVID YELLOW NATURAL COLOR, CLARITY GRADE VS1
ACCOMPANIED BY A GUBELIN REPORT
NO. 0202090, DATED FEBRUARY 28, 2002, STATING FANCY VIVID YELLOW NATURAL COLOR, CLARITY GRADE VS1
WITH AN APPENDIX STATING "THE 25.33 CT DIAMOND POSSESSES A VIVID PURE YELLOW COLOR WHICH IS EXCEEDINGLY RARE IN NATURALLY COLORED DIAMONDS OF THIS LARGE SIZE. IN ADDITION, THIS REMARKABLE DIAMOND POSSESSES A WELL PROPORTIONED OCTAGONAL FORM AND STEP CUT FACETING STYLE, WHICH IS COMPLIMENTED BY THE EXPERTISE CONDUCTED TO FINISH THE POLISH AND SYMMETRY OF THE GEM. DESERVING PARTICULAR MENTION, THIS EXTRAORDINARY DIAMOND REVEALS AN ATTRACTIVE DISPLAY OF BRILLIANCE, SCINTILLATION AND VIVID COLOR REFLECTIONS, WHICH IS UNCOMMON FOR DIAMONDS POLISHED IN THE STEP CUT FASHION. SUCH A COMBINATION OF OUTSTANDING ATTRIBUTES, INCLUDING
A HIGHLY SATURATED PURE YELLOW COLOR, IN A DIAMOND EXCEEDING
25 CARATS, IS VERY RARE"
ESTIMATE ON REQUEST
A MASTERPIECE
OF THE NATURAL
MINERAL WORLD
PURE YELLOW DIAMONDS ARE
RARE IN NATURE, HOWEVER, PURE "VIVID" YELLOW DIAMONDS ARE EXCEPTIONALLY RARE. SUCH DIAMONDS ARE HIGHLY SOUGHT AFTER BY GEM COLLECTORS WORLDWIDE, BECAUSE OF THE DIVERSITY THAT THIS COLOR RANGE OFFERS, AND THE CONSTANT SEARCH BY CONNOISSEURS TO FIND THE LARGEST AND MOST SATURATED "VIVIDEST" YELLOW DIAMOND.
WITH A STRONG "CANARY YELLOW" HUE AND LARGE SIZE THIS IS A DIAMOND WHICH IS EXTREMELY RARE AND MAY BE CONSIDERED BY GEM COLLECTORS AS A MASTERPIECE OF THE NATURAL MINERAL WORLD, WHICH MAY BE PLACED ALONGSIDE SUCH OTHER RARE AND FAMOUS LARGE YELLOW DIAMONDS AS THE "TIFFANY" YELLOW, THE "DE BEERS" YELLOW AND THE "STAR OF DENMARK" YELLOW.
THIS 25.33 CARAT VIVID YELLOW DIAMOND IS AN EXCEPTIONALLY RARE EXAMPLE OF A PREDOMINANTLY TYPE IB DIAMOND. LESS THAN 1% OF ALL YELLOW DIAMONDS ARE TYPE IB, WHICH EXHIBIT EXCEPTIONALLY STRONG YELLOW COLOR. THEY ARE ALSO USUALLY SMALL IN SIZE,
BEING LESS THAN 5 CARATS. THESE DIAMONDS ABSORB STRONGLY IN
THE BLUE PART OF THE SPECTRUM, DUE TO THE VARIOUS NITROGEN ATOMS, RESULTING IN AN ATTRACTIVE YELLOW COLOR, CLASSIFIED AS "CANARY YELLOW" BY GEMMOLOGISTS.
ALL NITROGEN CONTAINING NATURAL YELLOW DIAMONDS ARE REFERRED
TO AS EITHER "TYPE IA OR TYPE IB" DIAMONDS. TYPE IB YELLOWS, SUCH
AS THE PRESENT 25.33 CARAT STONE, CONTAIN NITROGEN ATOMS AS INDIVIDUAL ATOMS WHICH CAN SUBSTITUTE AN INDIVIDUAL CARBON ATOM IN THE DIAMOND LATTICE, WHEREAS TYPE IA YELLOWS HAVE THEIR NITROGEN ATOMS DISTRIBUTED IN PAIRS, TRIPLETS, OR LARGER GROUPS THROUGHOUT THE DIAMONDS CARBON ATOM STRUCTURE. TYPE IA DIAMONDS FORMED UNDER EXTREME PRESSURE FACILITATING NITROGEN AGGREGATION ARE THE ONLY TYPE
OF YELLOW DIAMONDS KNOWN
TO OCCUR IN LARGE SIZES OVER
25 CARATS, FIRST DISCOVERED IN SOUTH AFRICA IN THE 1800S.
OTHER IMPORTANT VIVID YELLOW DIAMONDS SOLD AT AUCTION:
SOTHEBY'S NEW YORK
APRIL 8, 1997, LOT 679
13.83 CARATS FANCY VIVID YELLOW MARQUISE-CUT
VS1 CLARITY $238,792 PER CARAT
CHRISTIE'S NEW YORK
APRIL 6, 1998, LOT 224
9.12 CARATS FANCY VIVID YELLOW RECTANGULAR-CUT
VS1 CLARITY $181,196 PER CARAT
SOTHEBY'S GENEVA
NOVEMBER 19, 1997, LOT 519
11.75 CARATS FANCY VIVID YELLOW OVAL-SHAPE
VS1 CLARITY $160,206 PER CARAT
CHRISTIE'S GENEVA
MAY 18, 1999, LOT 569
7.26 CARATS FANCY VIVID YELLOW RECTANGULAR-CUT
VS1 CLARITY $108,510 PER CARAT
PHILLIPS GENEVA
NOVEMBER 14, 2000, LOT 259
9.35 CARATS FANCY VIVID YELLOW BRILLIANT-CUT
VVS1 CLARITY $103,000 PER CARAT