

Chalcocite specimens for sale
124 for sale · $85–$12,500 USD
218 in the gallery
Chalcocite is a copper sulfide mineral that forms as a metallic, gray to black crystal or massive mineral with a characteristic high luster. It commonly occurs as fine-grained to coarser aggregates, often combining with other copper minerals to create strikingly dark, almost silver-gray surfaces that reflect light with a metallic gleam. The mineral is frequently found in hydrothermal ore veins and near porphyry copper deposits, where reducing conditions concentrate the copper sulfide and allow it to crystallize in foliated or bladed habits. Noted specimens come from classic localities around the world and can exhibit well-formed crystals and botryoidal or fibrous textures, making them a staple for cabinets and display pieces.
- Formula
- Cu2S
- Rarity
- Common
- Stability
- Moderately Stable
- Collector interest
- High Interest
- Classification notes
- Sulfides; Copper(I) sulfide (Cu2S); Strunz 2.C
Key characteristics
- Crystal system
- monoclinic
- Mohs hardness
- 2.5–3
- Specific gravity
- 5.5–5.8
- Luster
- metallic
- Transparency
- opaque
- Color
- gray, black
- Streak
- gray, black
- Cleavage
- poor
- Fracture
- conchoidal, uneven
- Crystal habit
- tabular, prismatic, granular, massive
- Classic / historic
Buy Chalcocite specimens
View all 124Where Chalcocite is found
Top localities
- Flambeau Mine66 specimens
- Dzhezkazgan mining district6 specimens
- Aït Ahmane5 specimens
- Geevor Mine5 specimens
- Bristol Copper Mine4 specimens
- Levant Mine4 specimens
- M'Passa Mine4 specimens
- Tonglushan Mine4 specimens
- Cook's Kitchen Mine3 specimens
- Milpillas Mine3 specimens
Guides
All guides

Chalcocite from Tsumeb Mine, Namibia
Chalcocite - gunmetal-gray crystals with bright faces, striations, and twinning; rare, well-formed Tsumeb specimens prized for precision metallic luster.Read guide
Chalcocite from Dzhezkazgan mining district, Kazakhstan
Chalcocite from Dzhezkazgan, Kazakhstan — steel-gray to black crystals with metallic luster and geometric form; highly valued by collectors for rarity and disp…Read guide
Chalcocite from Butte Mining District, Montana, USA
Chalcocite from Butte Mining District, Montana: steel-gray to blue-black blades, stacked pseudomorphs after covellite, rich paragenesis, and collector appeal.Read guide
Chalcocite from Bristol Copper Mine, Connecticut, USA
Chalcocite from Bristol Copper Mine, Connecticut — dark, tabular crystals on calcite; historic locality valued by collectors for its classic ore-crystal form.Read guideAbout Chalcocite
Collectors value chalcocite for its rich color, metallic lustre, and association with high-grade copper ore environments. In hand specimens the mineral’s color and reflective surface can contrast sharply with lighter minerals, enhancing display appeal. While often accompanying other copper sulfides, well-prepared pieces that show sharp, reflective surfaces and clean, dense masses are especially sought after by mineral enthusiasts who appreciate ore-mament textures and the mineral’s role in copper mineralogy.





















