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Rock guide

Chalcopyrite

mineral · common

Quick facts

Formula
CuFeS2
Hardness
3.5–4
Luster
Metallic
Colors
Brassy yellow, iridescent tarnish

Chalcopyrite is a copper iron sulfide mineral with a metallic luster and brassy yellow color. It's the most important copper ore and is found in many types of mineral deposits.

Identify by its brassy yellow color and greenish-black streak.

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