8.15 ctw Matched Pair Natural Black Spinel 8x8 mm Square Faceted Gemstones Gemstone Pendant This beautiful gemstone displays slightly

This beautiful gemstone displays slightly olive-green and green colors

offering a unique and timeless alternative to more conventional gemstones

Stamped '14k' and with a barely visible maker's mark

7 mm at the bottom of the band

is not a traditional mineral but rather the iridescent inner layer of Mollusk shells

8.15 ctw Matched Pair Natural Black Spinel 8x8 mm Square Faceted Gemstones Gemstone Pendant This beautiful gemstone displays slightlyBeautiful matched pair of 8. 1 mm x 8. 1 mm natural Black Spinel, 8. 15 carat total weight. New and ships in a gem container. Black Spinel is a striking and often underestimated gemstone, prized for its deep, inky color and exceptional brilliance. Composed of magnesium aluminum oxide, it forms as an isometric crystal, typically found in octahedral or dodecahedral habits. Its Mohs hardness of 8 makes it a durable choice for all types of jewelry, from