Alexandrite vs Ruby
| Property | Alexandrite | Ruby |
|---|---|---|
| Category | Semi-Precious Gems | Precious Gems |
| Primary Color | various | red |
| Mohs Hardness | 8.5 | 9.0 |
| Specific Gravity | 3.69 | 3.97 |
| Refractive Index | 1.739 | 1.762 |
| Crystal System | Orthorhombic | Trigonal |
| Luster | — | — |
| Chemical Formula | — | — |
| Price Tier | Fine ($500-5,000/ct) | Investment ($5,000+/ct) |
| Daily Wear | Yes | Yes |