This 10k white gold ring features a 4.00 ct. t.w. cushion shaped green amethyst with 1/10 ct. t.w. diamond and measures 12.30-mm. x 12-mm. Almost all gemstones have been treated to enhance their color and require special care. Shared prongs setting 1 Green Amethyst and 24 Diamonds Imported Care Clean with a soft bristle brush and warm soapy water. Use gold polishing cloth on gold items.