Silver Obsidian 7x8mm Faceted Round Nugget - 15-16 Inch Banded Faceted as well as gray and

as well as gray and white inclusions in marbled patterns

The green coloring has likened the stone of jadeite in the past

It is a white granite with dark gray mottling that also exhibits blue or green spots

currently believed to be due to the presence of a copper-based mineral such as Malachite or Azurite

A variety of granite sealing products are available online or through home improvement stores

Silver Obsidian 7x8mm Faceted Round Nugget - 15-16 Inch Banded Faceted as well as gray andEssentially 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)