Powell Butte Plume Agate Slab - Black and White Plume in Blue cut on two sides Spiderweb Obsidian

Spiderweb Obsidian

I am honestly unsure of what its composition is

and to my knowledge the person who knew where it was

making existing specimens irreplaceable pieces of lapidary history

or slicing for cabbing

Powell Butte Plume Agate Slab - Black and White Plume in Blue cut on two sides Spiderweb ObsidianPowell Butte Plume Agate Slab Black and White Plume in Blue Agate Ultra Rare Oregon Classic This very rare slab of Powell Butte Plume Agate displays well defined black plume alongside white plume set in a beautiful blue agate matrix. Some druzy pockets add natural character that could make a nice effect in finished pieces. The plume definition on this slab is something that is extremely hard to find today, with this material having not been dug for