Flower/Fireworks Obsidian Rough Chunk! Gastropod This could be vistaite

This could be vistaite

and Leopard Skin Rhyolite

which can make for some awesome display pieces or even more creative cabochons with a natural look

African Blue Lace Agate is a rare lace agate from Nambia

though some variation can occur

Flower/Fireworks Obsidian Rough Chunk! Gastropod This could be vistaiteFireworks Obsidian also goes by the name of Flower Obsidian. It is a very rare form of natural volcanic glass Obsidian found in Mexico. It has a very high mineral content, which gives this material its gorgeous pattern and colors! It often has chrysanthemum like flowering with a black or pink backdrop. It can take a decent polish, but with the impurities giving it this crazy display, it can often be fractured and pitted and may need to be stabilized