The Crystal and Mineral Vault

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Mahogany Obsidian: What Does It Have in Common With Mars?

by Laura Konst

Mahogany Obsidian is a variety of volcanic glass distinguished by the Hematite and Magnetite inclusions that give it its characteristic deep red-brown and black patterning. The same iron oxide that colours the surface of Mars red produces the warm tones in Mahogany Obsidian, while Magnetite creates the contrasting black zones. This guide explores the iron oxide chemistry, the formation geology, and where Mahogany Obsidian sits within the broader Obsidian family.

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