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| Mineral Family | Actinolite
| | Hardness | 5-6 | | Refractive Index | 1.614-1.641 | | Specific Gravity | 2.95-3.1 | Varieties
Click a family name
or variety for details.
| None |
| | Mineral Family | Amber
| | Hardness | 2-2.5 | | Refractive Index | 1.539-1.545 | | Specific Gravity | 1.0-1.02 | Varieties
Click a family name
or variety for details.
| None |
| | Mineral Family | Amblygonite
| | Hardness | 5.5-6 | | Refractive Index | 1.612-1.636 | | Specific Gravity | 2.98-3.06 | Varieties
Click a family name
or variety for details.
| None |
|
| Mineral Family | Ammonite
| | Hardness | varies | | Refractive Index | 1.52-1.68 | | Specific Gravity | 2.7 | Varieties
Click a family name
or variety for details.
| None |
| | |
| Mineral Family | Diamond  
| | Hardness | 10 | | Refractive Index | 2.41 | | Specific Gravity | 3.52 | Varieties
Click a family name
or variety for details.
| None |
| | |
