CHI209jr Chinese Agate, Middle-Class Mine Hematite This obsidian is black with

This obsidian is black with natural "snowflakes" of light gray spherulites

Decomposing sea life killed by volcanic eruptions had a chemical attraction for the sediment around them

or occasionally have effects like "Rainbow Obsidian" or "Midnight Lace Obsidian

A pack of 5 drill bits

and pale yellow-gray agate with banding and tubes

CHI209jr Chinese Agate, Middle-Class Mine Hematite This obsidian is black withThis is a polished specimen featuring orange agate with translucent blue gray agate outer ring. 4. 9 cm x 5. 2 cm 0. 16 lbs Agates from the Middle Class mine show a broad range of colors including red, yellow, purple, brown, blue, and black. Agates from the Middle Class mine also often contain druzy pockets with hematite and calcite crystals. Agates from this mine also contain a higher percentage of heat and stress fractures from the mining process