Oscar Heyman & Brothers | Black Opal, Diamond, Ruby and Sapphire Ring [黑色蛋白石配鑽石、紅寶石及藍寶石戒指]
Captivated by Color: Important Jewels and Gemstones from an American Collector
Oscar Heyman & Brothers
Black Opal, Diamond, Ruby and Sapphire Ring
Centering an oval-shaped black opal measuring approximately 17.8 x 13.6 mm, shouldered by marquise-shaped sapphires and rubies, accented with round near-colorless diamonds and diamonds of yellow hue, size 5½, with maker's mark, numbered 301743.
Accompanied by a Certificate of Authenticity dated February 2011 from Oscar Heyman & Brothers.Please note that the diamonds of yellow hue have not been tested for natural origin of color.
In very good condition, with very minor wear to the mounting. Shank interior stamped IRID. PLAT and 18K. The black opal stated to weigh 7.90 carats, medium tone, displays strong play-of-color, with primary hues of blue and green, secondary hues of red-orange and purple; with a few surface scratches noticeable only under 10x magnification, and light scratches to the reverse. Depth approximately 5.6 mm. The sapphires stated to weigh approximately 2.55 carats are medium deep blue, eye-clean to slightly included. The rubies stated to weigh approximately 1.50 carats are medium deep red, eye-clean to slightly included. The near-colorless diamonds stated to weigh approximately 1.25 carats approximately F-G color, VVS-VS clarity. The diamonds of yellow hue estimated to weigh approximately 0.30 carat approximately Fancy Vivid Orangy-Yellow, VS clarity. Accompanied by a Certificate of Authenticity dated February 2011 from Oscar Heyman & Brothers. Please note that the diamonds of yellow hue have not been tested for natural origin of color.
In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective qualified opinion. Illustrations in the catalogue may not be actual size. Prospective purchasers are reminded that, unless the catalogue description specifically states that a stone is natural, we have assumed that some form of treatment may have been used and that such treatment may not be permanent. Our presale estimates reflect this assumption.Certificates of Authenticity: Various manufacturers may not issue certificates of authenticity upon request. Sotheby's is not under an obligation to furnish the purchaser with a certificate of authenticity from the manufacturer at any time. Unless the requirements for a rescission of the sale under the Terms of Guarantee are satisfied, the failure of a manufacturer to issue a certificate will not constitute grounds to rescind the sale. Gemological Certificates and Reports: References in the catalogue descriptions to certificates or reports issued by gemological laboratories are provided only for the information of bidders, and Sotheby's does not guarantee and accepts no responsibility for the accuracy, terms or information contained in such certificates or reports. Please also note that laboratories may differ in their assessment of a gemstone (including its origin and presence, type and extent of treatments) and their certificates or reports may contain different results.NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING CONDITION OF A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF SALE PRINTED IN THE CATALOGUE.