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Only 1 left in stock
This is a Collector-grade Nontronite specimen from Minas Gerais, Brazil. It is the heaviest piece in this lot, a full cabinet specimen with depth behind the display face. The exact piece pictured measures 3.70" L x 3.17" W x 2.72" H and weighs 340 grams at Mohs 1-2, natural and completely untreated. Collectors keep this material behind glass rather than in a pocket.
Nontronite is a rare iron-rich smectite clay mineral in the phyllosilicate family, prized by mineral collectors for its vivid chartreuse-to-olive-green coloration and soft, chalky botryoidal surface texture. It forms through the hydrothermal alteration of iron-bearing rocks, typically in oxidized zones of nickel and iron deposits. With a Mohs hardness of just 1 to 2, it ranks among the softest collector minerals available, handled as a museum-quality specimen rather than a working stone. Collector-grade material from Minas Gerais, Brazil is especially sought for its saturated color and unusually well-preserved botryoidal structure. These are genuinely rare stones in the collector market, particularly at this size and color quality.
Nontronite is a deeply grounding stone, rooted in Earth energy and connected to both the Root and Solar Plexus chakras. It is associated with themes of transformation, endurance, and elemental stability, a reminder that profound structures take time and pressure to form. Crystal practitioners work with it for grounding during periods of upheaval, stabilizing energy in spaces that feel energetically scattered, and deepening connection to the natural world. Its rare, collector-quality nature makes it a meaningful piece for those drawn to working with unusual Earth energies.
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.
Nontronite sits at 1 to 2 on the Mohs scale, among the softest stones we carry, so handle it gently and keep it dry.
Natural nontronite from Minas Gerais, Brazil. Untreated. The color and the chalky botryoidal texture are exactly as the specimen came out of the ground.
Yes. This listing is one piece, photographed individually. When it sells, it is gone.
It measures 3.70" L x 3.17" W x 2.72" H and weighs 340 grams.
Minas Gerais, Brazil, through a community partnership with small-scale miners we have worked with for years. It came to us through a community partnership, 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. Pieces that miss the mark never reach the shop.
How We GradeSourced through a regional cooperative or community-based workshop. Processing and economic benefit stay local, which means more of the value reaches the people doing the work. 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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