Large Mexican Velvet Obsidian Rough Chunk! Knightia eocaena Some can have what appears

Some can have what appears to be organic material present

After cutting some

and is certainly one slab you wont want to miss out on

mainly composed of opal and silica

Weight: Approx 24

Large Mexican Velvet Obsidian Rough Chunk! Knightia eocaena Some can have what appearsMexican Velvet Obsidian is a higher quality obsidian with loads of magnetite that create the velvet like pattern and flashes within! It often features many different colors, and it works into some truly amazing cabochons! It takes an excellent polish and generally cuts fracture free! They can also make awesome pendants or can be great for wire wrapping projects! The color in velvet obsidian is light sensitive. In order to see it, you need to be under