BEAUTY:
STONE | 1. Brilliance (relative index) | 2. Fire (Dispersion) | 3. Luster |
Moissanite | 2.65 – 2.69 | 0.104 | 20.4% |
Diamond | 2.42 | 0.044 | 17.2% |
Ruby | 1.77 | 0.018 | 7.4% |
Sapphire | 1.77 | 0.018 | 7.4% |
Emerald | 1.58 | 0.014 | 4.8% |
DURABILITY:
STONE | 1. Hardness (Mohs) | 2. Toughness |
Moissanite | 9.25 | Excellent |
Diamond | 10 | Excellent* |
Ruby | 9 | Excellent** |
Sapphire | 9 | Excellent** |
Emerald | 7.5 | Good to poor |
*except good in cleavege direction
**except twinned stones
SPECIFIC GRAVITY:
STONE | SPECIFIC GRAVITY |
Moissanite | 3.21 |
Diamond | 3.52 |
Ruby | 4.00 |
Sapphire | 4.00 |
Emerald | 2.72 |