FIREBOOMOON 2lb Rough Black Obsidian Crystal Rocks for Tumbling Knapping

Pack Weight: 2 lb (950 g) lot of rough black obsidian in irregular pieces 1.18-2.2 in (3-5.5 cm); volcanic glass formed from magma, opaque jet black with possible sheen on fracture faces Raw State And Care: Stones arrive with thin dust coating; rinse in cool water and pat dry to reveal glossy surface; edges are naturally sharp, handle with gloves during knapping or tumbling For Tumbling And Knapping: Start with 60-grit silicon carbide for tumble polish; sharp conchoidal fractures make it suited for flint-knapping practice, arrowhead blanks and cabochon preforms Uses: Specimen collection, wire wrapping, resin inlay, vase filler, altar decor and meditation spaces; 2 lb yields dozens of palm pieces or 5-6 larger display chunks Color And Authenticity: Natural obsidian is opaque black, not painted or dyed; slight translucency on thin edges is normal; if a piece shows cobalt blue sheen it is still obsidian variant, not sodalite