Bornite, Calcite - image 1

Bornite, Calcite

$1,750.00

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Collector’s EdgeFeatured
753 for sale·296 sold
In the 1990s to early 2000s, the Dzhezakzgan mine in Kazakhstan produced what are arguably the world’s finest bornite crystals. Bornite is a copper iron sulfide mineral that is a important ore of copper. While it is a fairly common mineral, large well formed crystals of bornite are very seldom seen anywhere in the world, making these Kazakhstani specimens highly desirable amongst sulfide collectors or copper mineral collectors.

Product details

Species
Bornite, CalciteAbout Bornite →
SizeCabinet
Dimensions6.0 x 10.0 x 11.0 cm
Listed on09/25/2025
Locality
Kazakhstan, Karaganda Region, Dzhezkazgan mining districtRegional guide →
SKU74944

Learn more

Mineral guide
Learn about Bornite
vivid iridescent tarnish, metallic luster, and rare sharp crystals; formed in diverse deposits and prized by collectors for color, rarity, and histor…
Bornite
Regional guide
Bornite from Dzhezkazgan mining district, Kazakhstan
Dzhezkazgan is the bornite locality serious collectors use as a benchmark. Bornite is not an exotic species in ore deposits, but sharp, lustrous, free-standing bornite crystals of display quality are uncommon worldwide; Dzhezkazgan is one of the few places where the species came out as recognizable crystals rather than merely as metallic ore. The classic look is a dark, metallic, blue-black to black crystal—often with subtle violet, indigo, silver, or bronze tarnish—set against pale quartz, calcite, or bladed baryte. The contrast is part of the magic: a dense copper-iron sulfide with a dark velvet-metal surface perched on a light, sparkling gangue.