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This is an AA-grade Dioptase specimen from Renéville, Republic of the Congo. Dioptase forms in oxidized copper deposits, growing small emerald-green crystals prized well beyond their size. The exact piece pictured measures 0.68" L x 0.75" W x 0.73" H and weighs 8.3 grams at Mohs 5, completely natural and untreated. A favorite love stone for display shelves.
Dioptase is a rare copper cyclosilicate mineral best known for its extraordinary emerald-to-teal green color, produced by copper in its crystal structure. With a Mohs hardness of 5, it forms as well-defined hexagonal prismatic crystals, typically in oxidized zones of copper ore deposits. Despite its gemstone-quality color saturation, Dioptase is far too soft and brittle for use in jewelry, keeping it almost exclusively in the collector mineral market. Renéville in the Republic of the Congo is one of the world's premier Dioptase localities, producing specimens with exceptional color depth and crystal clarity that are sought globally by serious mineral collectors.
Dioptase is a Heart and Third Eye chakra stone, associated with deep emotional healing, forgiveness, and the expansion of love, both toward others and inward. Its intense green color reflects its alignment with the heart's energies, and it is used by practitioners to release grief, trauma, and emotional patterns that no longer serve. Among crystal workers, Dioptase is considered one of the most powerful healing stones for the heart, particularly during times of profound emotional release or transformation. Its copper content ties it energetically to Venus (the planet of love, beauty, and abundance), deepening its association with heart-centered work.
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.
Dioptase sits at 5 on the Mohs scale, soft enough to scratch with a knife, so keep it dry and store it on its own. The one thing that hurts it is sunlight: months in a bright window will fade the color, and it does not come back.
The green that stops you is real, not a dye.
Learn what Dioptase is, where ours comes from, traditional associations across cultures, and how to identify a real specimen, in our complete Dioptase Crystal Guide.
Natural dioptase from Renéville, Republic of the Congo. No. The color is structural, produced by copper in the crystal lattice, so there is nothing to dye or heat.
Yes. This listing is one piece, photographed individually. When it sells, it is gone.
It measures 0.68" L x 0.75" W x 0.73" H and weighs 8.3 grams.
Grade AA. Strong color saturation with well-defined crystal faces across the specimen. 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.
Renéville, Republic of the Congo. Renéville is the classic source for well-formed dioptase. Other deposits exist in Namibia, Kazakhstan, and Arizona. 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. 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 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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