Chalcostibite specimens for sale
5 for sale · $300–$9,500 USD
22 in the gallery
Chalcostibite is a copper antimony sulfosalt mineral that forms as small, metallic crystals with a brilliant, sometimes iridescent copper-brown surface. It commonly occurs in granular or prismatic habits and displays a bright metallic luster that catches the eye in hand specimen. Its color can range from brass-yellow to a deeper coppery bronze, often contrasting with neighboring minerals in oxidized ore zones.
- Formula
- CuSbS2
- Rarity
- Uncommon
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Sulfosalt, chalcostibite group (Strunz 2.HA)
Key characteristics
- Crystal system
- orthorhombic
- Mohs hardness
- 3–4
- Specific gravity
- 4.9–5.1
- Luster
- metallic
- Transparency
- opaque
- Color
- gray, black
- Streak
- black
- Cleavage
- perfect
- Fracture
- uneven
- Crystal habit
- prismatic, tabular, granular, massive
Buy Chalcostibite specimens
View all 5
Where Chalcostibite is found
Top localities
- Boldut Mine5 specimens
- Saint-Pons4 specimens
- Herja Mine1 specimen
About Chalcostibite
Notable specimens come from Morocco and France, where hydrothermal veins and polymetallic deposits yield sharp, well-formed crystals embedded in matrix or as isolated crystals within sulfide-rich assemblages. Localities in Europe and North Africa have produced some of the more collectible examples, prized for their luster, color, and compact crystalline forms. Collectors value chalcostibite for its distinctive look among sulfosalts and its relative rarity in well-crystallized specimens.
For mineral enthusiasts, chalcostibite offers a study in banded, metallic textures and oxidation-driven color variation. Its association with other copper and antimony-bearing minerals can provide context for ore-forming processes, while the aesthetic appeal of crisp, glassy surfaces adds appeal to polished or displayed specimens.