Obsidian Sphere | Classic Natural Black Crystal | Huge 116mm, 4.57 in | 2.186 kg LL4 it has two double terminated

it has two double terminated apophyllite crystals as well as many single terminated points nestled into the calcite

Its dimensions are 77x62x28mm

Nestled in a matrix of ivory colored calcite

The cluster is perfect for display in any home or office

Microcline is one of the most common feldspar minerals

Obsidian Sphere | Classic Natural Black Crystal | Huge 116mm, 4.57 in | 2.186 kg LL4 it has two double terminatedObsidian is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. Pure obsidian is usually dark in appearance, though the color varies depending on the impurities present. Iron and other transition elements may give the obsidian a dark brown to black color. Most black obsidians contain nano inclusions of magnetite, an iron oxide. Very few samples of obsidian are nearly colorless. In