Chalcopyrite
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Physical & Optical Properties
Mohs Hardness
| Mohs | Reference mineral | Chalcopyrite |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | ● |
| 5 | Apatite | |
| 6 | Orthoclase | |
| 7 | Quartz | |
| 8 | Topaz | |
| 9 | Corundum | |
| 10 | Diamond |
Crystal System
Value & Market
Where to Buy Chalcopyrite
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About Chalcopyrite
Chalcopyrite is a brassy yellow copper iron sulfide—the most important copper ore mineral—that develops a gorgeous iridescent tarnish of purple, blue, gold, and red when its surface weathers, a phenomenon called chalcopyrite peacock ore. This vivid interference coloring on natural or acid-treated specimens makes it extremely popular as a decorative and collector mineral. Despite its brilliant surface display, raw chalcopyrite is too soft and reactive for use as a cut gem.