| Property | Amethyst | Cubic Zirconia |
|---|---|---|
| Category | Semi-Precious Gems | Semi-Precious Gems |
| Primary Color | purple | various |
| Mohs Hardness | 7.0 | 8.5 |
| Specific Gravity | 2.65 | 5.5 |
| Refractive Index | 1.544 | 2.15 |
| Crystal System | Trigonal | Isometric |
| Luster | — | — |
| Chemical Formula | — | — |
| Price Tier | Moderate ($50-500/ct) | Fine ($500-5,000/ct) |
| Daily Wear | Yes | Yes |