12ST410-B: Grey Banded Obsidian Round 12mm 33 Piece Per Strand 30% Off30% Off Pinit $38.50 Quantity discounts available QuantityPrice SKU: 12ST410-B Quantity -+ Add to Cart Details Obsidian is a natural volcanic glass. Obsidian is formed when viscous lava is rapidly cooled, most commonly by water. Obsidian is less fragile than s... Material Banded Obsidian Glass Country of Origin China DetailsMaterialCountry of OriginBackObsidian is a natural volcanic glass. Obsidian is formed when viscous lava is rapidly cooled, most commonly by water. Obsidian is less fragile than standard window glass, and was often fashioned into sharp cutting edges by stone age manBackBanded Obsidian GlassBackChina