Obsidian 8x10mm Triangle Cut Faceted Puff Oval - 15-16-Inch Dendritic Black Opal and turquoise is a leftover

and turquoise is a leftover mineral from these practices

this opal variety is characterized by their dark base tone

orange and rust are due to traces of hematite within the stone

The shell is often found naturally polished with a green or brown spiral on one side and a white "eye" on the other

Obsidian 8x10mm Triangle Cut Faceted Puff Oval - 15-16-Inch Dendritic Black Opal and turquoise is a leftoverEssentially a volcanic glass, Obsidian ranges in color from opaque black, to green, brown, mahogany, black with rainbow colors, black with snowflake patterns, black with a golden sheen, and translucent black (Apache Tears)