Emerald vs Garnet (almandine)
Emerald is harder (Mohs 7.5–8) than Garnet (almandine) (Mohs 7–7.5), so it resists scratching better.
Garnet (almandine) has the higher refractive index (1.790 vs 1.577–1.583), which a refractometer can use to separate them.
Garnet (almandine) is denser (SG 4.05 vs 2.72); a garnet (almandine) of the same size weighs about 49% more.
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| Property | Emerald | Garnet (almandine) |
|---|---|---|
| Species / material | Beryl | Garnet |
| Mohs hardness | 7.5–8 | 7–7.5 |
| Refractive index | 1.577–1.583 | 1.790 |
| Specific gravity | 2.72 | 4.05 |
| Crystal system | Hexagonal | Cubic |
| Birefringence | 0.005–0.009 | None (isotropic) |
Values are typical ranges from standard gemmological references; individual stones can vary.
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