Origin: Burns, Oregon, U.S.A.

Description: Black Obsidian is a natural volcanic glass formed from rapidly cooled lava, admired for its jet-black color and sharp, glassy appearance. This rough material from Burns, Oregon showcases the classic characteristics of obsidian, with conchoidal fracture surfaces that glisten under light and edges that reveal its volcanic origins. With a Mohs hardness of 5–5.5, obsidian is softer than crystalline quartz but durable enough for cutting, carving, or tumbling. In lapidary work, it produces smooth, mirror-like finishes that highlight its intense depth of color.

The Burns region of Oregon is known for producing high-quality obsidian, making it a favorite among lapidary artists and collectors. In its rough state, each piece carries the raw energy of its volcanic formation, while worked material transforms into sleek cabochons, beads, or decorative objects. Whether left natural or polished to a glassy sheen, this obsidian offers both geological intrigue and artistic potential, embodying the dramatic beauty of Oregon’s volcanic landscapes.

Watch How This Was Mined Here!

Chemical Composition: SiO₂

Grade: Lapidary Grade
Appearance: Opaque
Inclusions: Minimal

Approximate Size of 1 pc: 100mm x 80mm x 40mm
Approximate Weight of 1 pc: 360g

Rough is rough. We do our best to grade and describe pieces in the lot, but ultimately, they all differ.