Natural Black and White Gemstones Crossover Ring Set in Sterling Silver Marked 925 and SUN Ring Size: 6.5 Metal Content: 925 Sterling Silver This ring features natural/genuine black & white gemstones in a crossover design that gives a multi-band look. The white gemstones test as tiny diamonds; the black gemstones test as sapphire or topaz. Priced based on metal content and style. Stones this size are difficult to test accurately. See video and pictures for sparkle.