Antique, Art Deco, 18ct Rose Gold, French, Natural Colour-Change Sapphire and Diamond Cluster Ring
Colour-change sapphire and diamond ring, 20th century. This unheated Sri Lankan sapphire appears a subtle cornflower blue in daylight, and a soft violet in incandescent light. The reason for this unusual phenomenon is the presence of Chromium in the stone, which gives the stone its violet hue, and interacts with different colours of light to change the shade of the stone. The presence of Chromium also means that, unusually for a blue sapphire, it also fluoresces red. Under The design is a classic cluster with touches of Edwardian inspiration, particularly in the millegrained settings of the diamonds, making it a beautiful and timeless choice for an engagement ring.
Place Of Origin |
France |
Stone Type |
Sapphire: approx. 3.4 carats |
Stone Dimensions |
Sapphire approximately 8.5 x 7.5 x 5.4mm |
Metal Type |
18 carat yellow gold |
Marks |
French import assay mark for 18 carat gold |
Date Of Manufacture |
20th century |
Period Of Manufacture |
Art Deco |
Condition |
Very good |
Signs Of Wear |
Very minor wear commensurate with age |