Huge Velvet Obsidian Slab – Flashy Mexican Lapidary Stone with Color Shifts Green River Wyoming They’re actually the fossilized boring

They’re actually the fossilized boring tunnels of shipworm larvae (Teredo) that burrowed into the wood during the Cretaceous period before it petrified

This is a rare and visually striking piece of Labradorite rough from Madagascar featuring hard-to-find purple flash

but some endcuts do exist that would be best as displays

Measurements (inches - longest - approx):  4 x 3

a rare seam jasper found in the remote regions of Western Australia

Huge Velvet Obsidian Slab – Flashy Mexican Lapidary Stone with Color Shifts Green River Wyoming They’re actually the fossilized boringVelvet Obsidian Slab Large Old Stock with Intense Flash and Rare Color Play This is a massive slab of Mexican Velvet Obsidian, absolutely packed with vivid flash and layered velvet patterning. Velvet Obsidian is already a rare material, but finding it in a slab this large is exceptionally uncommon. Most pieces come out as small, trimmer sized chunksthis slab is a true collectors opportunity. Measurements (inches longest approx.): 8. 9 x 5. 9 x 0. 30