Obsidian Sphere | Classic Natural Black Crystal | Huge 116mm, 4.57 in | 2.186 kg LL4 such as hornblende

such as hornblende

Its dimensions are 77x62x28mm

giving them a solid

The cluster is perfect for display in any home or office

Obsidian Sphere | Classic Natural Black Crystal | Huge 116mm, 4.57 in | 2.186 kg LL4 such as hornblendeObsidian 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