Opal Oval Shape Cabochon. Fine Color Quality. Weight: 4.77 ct Size: 15.30 x 9.93 x 6.65 mm. Color: Vivid play of colors. Luster: Multicolor. Treatment: No indications of treatment. ALGT Certificate Report no. 59452207. Top gem - Great size, perfect for a centerpiece - Top luster - Mentioned by the Lab as well as a 'Fine Color Quality' gem. Unique to Opal, ‘play of color’ is the attractive flashes of colorful brilliance that change with the angle of observation. An Opal with a play of color with three or more hues is called ‘a multicolor’. October’s birthstone, Opal, is from the Greek ‘opallios’, meaning ‘to see a change Shipment with a reliable service provider will be trackable and will be insured. Duties and taxes will be the Buyer's responsibility. IMPORTANT: The pictures were taken under white and yellow light with magnification on different backgrounds, intended to be displayed as accurately as possible. We have tried to capture as real colors/luster as possible, but they may differ slightly.