Tumbled Mixed Black Tourmaline and Sardonyx / 20-40mm AVG - 1 KILO LOT Menu Cubes resulting in white streaks

resulting in white streaks

Obsidian is not a gemstone but a kind of glass that forms when volcanic lava rapidly cools in the open air without forming any specific crystalline structures

or in botryoidal growths

They'll be as beautiful as those in the photos

Selenite Bowl measures approximately 3

Tumbled Mixed Black Tourmaline and Sardonyx / 20-40mm AVG - 1 KILO LOT Menu Cubes resulting in white streaksQuantity: 1 kilogram Average size range: 20 to 40 millimeters This assortment of 100% natural gemstones and minerals is perfect for art projects or for display. Each assortment contains a random selection of gemstones, and no two lots will be the same. This mix of black tourmaline and sardonyx comes to us directly from India.