mineral

Painite

Painite, CaZrAl₉O₁₅(BO₃)

AI-generated identification · may be incorrect

Mohs hardness about 8; typically reddish-brown to dark red with a vitreous luster. It has an orthorhombic crystal structure and indistinct cleavage; the label identifies this specimen as red painite.

Identified October 1, 2026More mineral →

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Physical properties

Mohs hardness about 8; typically reddish-brown to dark red with a vitreous luster. It has an orthorhombic crystal structure and indistinct cleavage; the label identifies this specimen as red painite.

Formation & geological history

A rare borate mineral formed in metamorphic rocks, especially marble, during geological processes involving boron-rich fluids. The specimen’s exact age and locality are not established by the image.

Uses & applications

Primarily a collector’s gemstone; transparent material may be faceted, but most specimens are valued for rarity rather than commercial use.

Geological facts

Painite was once considered one of the rarest minerals known. The pictured label appears to report a 51.00-carat natural specimen and laboratory certification.

Field identification & locations

Identify it by its deep red-brown color, high hardness, and verified mineralogical testing; appearance alone is not conclusive. Notable deposits occur in Myanmar, with additional finds reported elsewhere in Southeast Asia.