| Property | Apatite | Phosphophyllite |
|---|---|---|
| Category | Semi-Precious Gems | Semi-Precious Gems |
| Primary Color | various | various |
| Mohs Hardness | 5.0 | 3.0–3.5 |
| Specific Gravity | 3.16 | 3.07 |
| Refractive Index | 1.628 | 1.595 |
| Crystal System | Hexagonal | Monoclinic |
| Luster | Vitreous | Vitreous |
| Chemical Formula | — | — |
| Price Tier | Budget (< $50/ct) | Budget (< $50/ct) |
| Daily Wear | いいえ | いいえ |