Corrundum (Placer) - Mineral Stone Jewelry Broken Ox The 10x lens allows one

The 10x lens allows one to inspect for internal inclusions

Azurite is a copper carbonate mineral with the chemical composition Cu₃(CO₃)₂(OH)₂

Description: This is two halves of an Anchisaurus fossil

motivation

This phenomenon occurs when the crystal grows in stages

Corrundum (Placer) - Mineral Stone Jewelry Broken Ox The 10x lens allows oneMined from: Alder, Montana Description: This natural corundum placer specimen comes from the historic gem bearing gravels of Alder, Montanaan area long celebrated for its sapphires and other alluvial treasures. These water worn corundum fragments were naturally tumbled by ancient stream systems, giving them a slight rounded appearance that reflects their journey through time. Composed of aluminum oxide, corundum ranks 9 on the Mohs hardness scale,