Mahogany Obsidian

Hardness of 5.5 on the Mohs scale, reddish-brown and black patches or stripes, vitreous luster, amorphous crystal structure (no true crystal lattice), conchoidal fracture, specific gravity of around 2.35-2.45.

Formed as an extrusive igneous rock when felsic lava cools rapidly with minimal crystal growth. Mahogany coloration is due to the inclusion of hematite or magnetite nanoparticles.

Used for jewelry, ornamental carvings, lapidary arts, and historically for cutting tools and arrowheads.

Mahogany obsidian combines the properties of standard black obsidian with the earthy tones of iron oxide inclusions, making each piece uniquely patterned.

Easily identified by its distinctive conchoidal fracture, glass-like luster, and characteristic black and brown mottled or banded color pattern. Frequently found in volcanic regions worldwide, particularly in the western United States, Mexico, and areas with past volcanic activity.