OBSIDIAN Gold Sheen Large (20-30mm) polished stones 1 lb. HAND SORTED The color of grape agate

The color of grape agate ranges from a light lilac to deep purple

Rhodochrosite occurs as a hydrothermal vein mineral along with other manganese minerals in low temperature ore deposits as in the silver mines of Romania where it was first found

so around 1/2"

Fortunately material from these mines is quite valuable

the most well-known locality for producing fine quality pyrite crystals

OBSIDIAN Gold Sheen Large (20-30mm) polished stones 1 lb. HAND SORTED The color of grape agateOBSIDIAN Obsidian is also known as "volcanic glass" as it is formed when rapidly cooling lava has a high silica content and other conditions are present. Normally, Obsidian is black but other minerals or properties in the lava can cause coloration. A very common colored obsidian is a brick red variety called "Mahogany Obsidian". Gold and silver "sheen" obsidian are relatively uncommon. Gold sheen is caused by gas bubbles aligned along layers of lava