Chalcopyrite | Gemopedia

Named for the Greek khalkos meaning "copper," and "pyrite," chalcopyrite is a major ore of copper. It has a metallic luster, resembling gold. Specimens are often collected and are found in Colorado, Arizona in the USA, as well as England, Tasmania, Germany, Canada, Spain, Japan and China.
Alternate
Names
Copper Pyrite
Colors
Brassy, maybe Tarnished, Iridescent

Chalcopyrite Classification

Common Name

Chalcopyrite

Species

Chalcopyrite

Variety

Colors

Brassy, maybe Tarnished, Iridescent

Alternate Names

Copper Pyrite

Gemstone Groups

Key Separations

SG, mohs hardness, appearance

Comments

Chalcopyrite Optical Properties

Transparency

Opaque

Refractive Index

0

Birefringence

Optic Character

NA

Optic Sign

NA

Polariscope Reaction

Fluorescence

SWUV: Inert
LWUV: Inert

CCF Reaction

Pleochroism

None

Dispersion

Comments

Chalcopyrite Chemistry & Crystallography

Chemical Name

copper iron sulfide

Chemical Formula

CuFeS2

Synthesis

Crystal System

Tetragonal

Classification

Sulfide

Nature

Natural

Crystallinity

Crystalline to Aggregate

Comments

Chalcopyrite Characteristic Physical Properties

Hardness

3.5-4

Streak

Specific Gravity

4.1-4.3

Toughness

Poor

Inclusions

Luster

Metallic

Stability

Fracture

Uneven

Cleavage

Poor, in two directions

Comments

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