Azurite vs Chalcopyrite
Azurite and Chalcopyrite are genuine alternatives to one another — a choice somebody actually makes — and differ on 4 measured properties, crystal system most clearly.
Azurite vs Chalcopyrite
Azurite
Cu3(CO3)2(OH)2
The blue copper carbonate that slowly becomes the green one — which is why so many old skies have turned to foliage.
| Property | Azurite | Chalcopyrite |
|---|---|---|
| Crystal system Categorical values can be listed side by side but not ordered or subtracted. | monoclinic | tetragonal |
| Density | 3.7–3.9 g/cm³ | 4.1–4.3 g/cm³ higher |
| Lustre Categorical values can be listed side by side but not ordered or subtracted. | vitreous | metallic |
| Mohs hardness Mohs hardness is an ordinal scale: values can be ranked, but differences and ratios between them are not meaningful. | 3.5–4 | 3.5–4 |
| Streak Categorical values can be listed side by side but not ordered or subtracted. | light blue | greenish black |