Mahogany Obsidian Natural Volcanic Glass
The colour of mahogany obsidian comes from the presence of iron oxides, usually hematite or limonite. One of the most common iron oxides is rust.
Obsidian is molten magma that cooled too rapidly for crystals to grow. Where crystals are present they're microscopic. Being largely void of crystals means obsidian is not a mineral. Minerals are made up of crystals.
Some geologists describe obsidian as a congealed material with minor amounts of microscopic crystals and other rock impurities.
Like other types of glass it breaks with a conchoidal fracture. This is because it lacks a crystalline structure. The presence of crystals would cause the edges to be more jagged.
Mahogany obsidian is also known as red obsidian.
Obsidian is relatively soft and breaks easily. Tumbled stones tend to be smooth and tactile but whilst being produced often incur minor chips.
Our mahogany obsidian crystals are size medium. Size can vary from piece to piece.
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