Black Obsidian 10x8mm Faceted Butterfly - 15-16 Inch With Matrix It is named for its

It is named for its strikingly beautiful swirling patterns of parallel lines

Turritella Agate’s rich brown and black colors are patterned with the fossilized remains of sea creatures millions of years old

Its bright green coloration is due to traces of chromium

a microscopic protozoa with a silica shell

it is found in a pale and earthy green

Black Obsidian 10x8mm Faceted Butterfly - 15-16 Inch With Matrix It is named for itsEssentially 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)