Amazonite
Varietyof Microcline
Amazonite is the green to blue-green variety of microcline feldspar. As a variety of Microcline, it shares that species' composition (K(AlSi3O8)), crystal structure, and hardness; the distinction is the appearance defined above.
Photos
About Microcline
Full reference data — crystallography, X-ray diffraction, and cited physical properties — is on the Microcline species page.
| Formula | K(AlSi3O8) |
|---|---|
| Hardness (Mohs) | 6-6.5 |
| Specific gravity | 2.54-2.57 |
| Density (calculated) | 2.572 |
| Crystal system | triclinic |
| Color range | green, red, white, yellow |
| Luster | pearly, vitreous |