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

[華彩綺夢：美國重要珠寶及寶石珍藏]

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]

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.