Spinel Stone Faceted Round Strand | 2mm | Black | 330 Bead(s)Black Spinel Faceted round Gemstone bead strand for jewelry making. These sparkling gorgeous faceted black Spinel beads will make a wonderful necklace or earrings. Throw in a few in your creations to substitute for black diamonds and no one will know the difference. This is also one of the August Birthstones. Black spinel stone is a rare gemstone made up of hard vitreous magnesium aluminium oxide or magnesium aluminate. Specifically, black spinel is