Chalcopyrite Archives - Cochise College Geology

Chalcopyrite

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Chalcopyrite

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chalcopyrite-yellow metallic rounded nugget

Chemical Group: Sulfide

Chemical Formula: CuFeS₂

Color: Strong brassy yellow on fresh surface, chalcopyrite often tarnishes, sometimes iridescent

Luster: Metallic Transparency: Opaque

Streak: Greenish black

Hardness: 3.5 to 4 Specific Gravity: 4.1 to 4.3

Fracture: Uneven Cleavage: Sometimes observed

Crystal Forms and Habits: Tetragonal system. Chalcopyrite commonly crystallizes as tetrahedrons. Chalcopyrite is often found in massive form.

Mineral Associations: Galena, dolomite, bornite, sphalerite

Identifying Characteristics: Bright brassy metallic color

Uses: Copper ore

Occurrences: Tri-State district; Butte Montana

Toxicity: When-swallowed: moderate When-inhaled: moderate

Additional Information: Chalcopyrite is derived from chalcos (Greek for copper) and pyrite (an iron sulfide).

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Photos

Chalcopyrite 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

Chalcopyrite - Tarnished Brassy – Massive

Chalcopyrite - Tarnished Yellow Brassy – Massive

chalcopyrite-brassy yellow crystal in brown sphalerite — Chalcopyrite - Brassy Yellow Crystal In Brown Sphalerite

Chalcopyrite - Bright Brassy Yellow Polished Egg Shapes – Peru

chalcopyrite-brassy yellow nugget — Chalcopyrite - Brassy Yellow Nugget

Chalcopyrite - Tetragonal Yellow Brassy Crystals On Dolomite

chalcopyrite-bright brassy yellow-massive — Chalcopyrite - Bright Brassy Yellow - Massive

Chalcopyrite - Bright Brassy Yellow Polished Egg Shapes – Peru

chalcopyrite-bright brassy yellow polished egg shapes-Peru — Chalcopyrite - Bright Brassy Yellow Polished Egg Shapes - Peru

chalcopyrite-massive with colorful tarnish — Chalcopyrite - Massive With Colorful Tarnish

chalcopyrite-bright brassy yellow-massive — Chalcopyrite - Bright Brassy Yellow - Massive

Chalcopyrite - Tetragonal Yellow Brassy Crystals On Dolomite

chalcopyrite-metallic luster crystals-microscope view — Chalcopyrite - Metallic Luster Crystals - Microscope View

chalcopyrite-tarnished brassy-massive — Chalcopyrite - Tarnished Brassy - Massive

Chalcopyrite - Tetragonal Yellow Brassy Crystals On Dolomite

chalcopyrite-tarnished yellow brassy-massive — Chalcopyrite - Tarnished Yellow Brassy - Massive

Chalcopyrite - Yellow Brassy Crystal On Gray Galena

chalcopyrite-tetragonal yellow brassy crystals on dolomite — Chalcopyrite - Tetragonal Yellow Brassy Crystals On Dolomite

chalcopyrite-yellow brassy crystal on gray galena — Chalcopyrite - Yellow Brassy Crystal On Gray Galena

Chalcopyrite - Yellow Brassy Crystals With Gray Galena

chalcopyrite-yellow brassy crystals with gray galena — Chalcopyrite - Yellow Brassy Crystals With Gray Galena

Chalcopyrite - Yellow Brassy Crystals With Gray Galena

Chalcopyrite - Yellow Brassy Tetragonal Crystal

chalcopyrite-yellow brassy tetragonal crystal — Chalcopyrite - Yellow Brassy Tetragonal Crystal

chalcopyrite-yellow metallic crystals on gray galena — Chalcopyrite - Yellow Metallic Crystals On Gray Galena

Chalcopyrite - Yellow Metallic Luster Crystals On Black Sphalerite - Peru

chalcopyrite-yellow metallic luster crystals on black sphalerite-Peru — Chalcopyrite - Yellow Metallic Luster Crystals On Black Sphalerite - Peru

chalcopyrite-yellow metallic rounded nugget — Chalcopyrite - Yellow Metallic Rounded Nugget

chalcopyrite-yellow metallic luster crystals on brown sphalerite — Chalcopyrite - Yellow Metallic Luster Crystals On Brown Sphalerite

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