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In stock
Good quality, good price and excellent customer service.
Lisa J. · Verified buyer · June 2026
These are AA-grade Black Obsidian tumbled stones from Salta Province, Argentina, sold by the piece or by the pound. Black Obsidian is rapidly cooled lava glass, breaking with the smooth curved fracture typical of natural glass. Each piece runs 1-1.50 inches at Mohs 5-5.5, fully natural and untreated. A favorite grounding stone for pockets.
Black obsidian is volcanic glass. Sharp, glossy, formed when lava cooled too fast to crystallize. It's one of the oldest materials humans have used for tools, and it still feels ancient when you hold a piece.
This piece comes from Salta Province, Argentina.
Named after Obsius, a Roman who reportedly first found it in Ethiopia.
In crystal traditions, black obsidian is often associated with a sense of groundedness when things feel uncertain, staying connected to your body and the moment, and cleansing. It's traditionally linked to the root chakra. If that resonates, hold one in your non-dominant hand for a few breaths when things feel shaky. Work with it the way that fits your own practice.
These are traditional associations drawn from historical practice. This stone is not a substitute for medical or mental health care.
Offered as a starting point for your own practice.
Black Obsidian sits at 5-5.5 on the Mohs scale, soft enough to scratch with a knife, so keep it dry and store it on its own. Keep chemical cleaners away from it; they can etch the surface.
Natural black obsidian from Salta Province, Argentina. Untreated. A natural volcanic glass.
You'll receive pieces from the same batch photographed, weighed to the amount you choose. Every piece passes our quality control and meets or exceeds what you see in the photos. Single specimens are listed separately and say so.
Each piece measures 1 to 1.5 inches on its longest side and weighs 10 to 30 grams. About 24 to 40 pieces per pound at this size, and each option shows its piece count.
Grades reflect visual quality within a batch. A is standard, with typical inclusions. AA shows stronger color, cleaner surfaces and tighter sizing. AAA is the top 10 to 15 percent of a batch. Every lot is inspected and graded by our team in Rockville, Maryland, not taken on the supplier’s word.
This batch is from Salta Province, Argentina. It came to us through a direct source, one of the sourcing models we publish and stand behind.
Every lot is inspected and graded by our expert team before it is listed, not taken on the supplier's word. AA on this listing means stronger color, cleaner surfaces and tighter sizing than the batch average. Pieces that miss the mark never reach the shop.
How We GradeWe work directly with the mine or workshop, with no intermediaries in between. The relationship is personal, pricing is transparent, and we can speak to each batch. We say what we know and where our tracing stops.
Our Sourcing StandardsEverything we sell is natural in origin: never synthetic, never dyed, never coated. Where a stone has been heated, irradiated or stabilized, which is common in the trade for some species, we say so on the listing. If a piece is not as described, return it within 90 days of delivery.
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