gemstone
Painite
Painite, CaZrAl₉O₁₅(BO₃)
AI-generated identification · may be incorrectThe label identifies a rough, red, 51.00 ct specimen with vitreous luster and specific gravity 4.01. Painite is typically Mohs 8; its crystals are trigonal, and the pictured rough fragment is too small to assess cleavage reliably.
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Physical properties
The label identifies a rough, red, 51.00 ct specimen with vitreous luster and specific gravity 4.01. Painite is typically Mohs 8; its crystals are trigonal, and the pictured rough fragment is too small to assess cleavage reliably.
Formation & geological history
A rare borate mineral formed in metamorphic environments, often associated with marble and other boron-rich rocks. Its geological age is not established by the image or certificate.
Uses & applications
Primarily a collector gemstone because of its extreme rarity; faceted painite is occasionally used in jewelry.
Geological facts
Painite was once considered one of the rarest minerals known. The pictured certificate reports refractive index 1.78–1.81 and no treatment.
Field identification & locations
Look for a deep red to brown-red color, high density, and vitreous luster; laboratory testing is needed to distinguish it confidently. Known occurrences include Myanmar, especially the Mogok region.
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