Pearl vs Moissanite
Moissanite is harder (Mohs 9.25) than Pearl (Mohs 2.5–4.5), so it resists scratching better; Pearl is softer than quartz dust (7) and needs more care in everyday rings.
Moissanite has the higher refractive index (2.648–2.691 vs 1.53–1.69), which a refractometer (over-the-limit reading) can use to separate them.
Moissanite is denser (SG 3.22 vs 2.71); a moissanite of the same size weighs about 19% more.
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| Property | Pearl | Moissanite |
|---|---|---|
| Species / material | Organic (nacre) | Silicon carbide |
| Mohs hardness | 2.5–4.5 | 9.25 |
| Refractive index | 1.53–1.69 | 2.648–2.691 |
| Specific gravity | 2.71 | 3.22 |
| Crystal system | Organic | Hexagonal |
| Birefringence | Not applicable | 0.043 |
Values are typical ranges from standard gemmological references; individual stones can vary.
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