1920's Portrait Colour Change Sapphire Intaglio Seal unisex 6ct Aquamarine

6ct Aquamarine

Natural Turquoise and Split Pearls

Demantoid Garnet and old cut Diamonds

They date from the 1970s and are modelled in 9k gold throughout

Posy Rings (aka posie

1920's Portrait Colour Change Sapphire Intaglio Seal unisex 6ct AquamarineDATE: Art Deco, c. 1920 A fantastic colour change sapphire (synthetic) seal, with a intaglio carving to the base. It's carved with a ladies portrait and the stone changes from a bluey purple to a turquoise green when moved from electric light to daylight. It remains in great condition and dates to the Art Deco period, circa 1920. Colour change gemstones possess the ability to appear as two completely different colours depending on the type of light