Peridot vs Jadeite jade
Peridot and Jadeite jade have similar hardness (Mohs 6.5–7).
Their refractive indices are close (1.654–1.690 vs 1.66), so combine RI with SG, optic character, or inclusions to separate them.
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| Property | Peridot | Jadeite jade |
|---|---|---|
| Species / material | Olivine (forsterite) | Jadeite (pyroxene) |
| Mohs hardness | 6.5–7 | 6.5–7 |
| Refractive index | 1.654–1.690 | 1.66 |
| Specific gravity | 3.34 | 3.34 |
| Crystal system | Orthorhombic | Monoclinic (aggregate) |
| Birefringence | 0.035–0.038 | Not usually measurable |
Values are typical ranges from standard gemmological references; individual stones can vary.
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