Zircon vs Jadeite jade
Zircon and Jadeite jade have similar hardness (Mohs 6.5–7.5).
Zircon has the higher refractive index (1.925–1.984 vs 1.66), which a refractometer (over-the-limit reading) can use to separate them.
Zircon is denser (SG 4.69 vs 3.34); a zircon of the same size weighs about 40% more.
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| Property | Zircon | Jadeite jade |
|---|---|---|
| Species / material | Zircon | Jadeite (pyroxene) |
| Mohs hardness | 6.5–7.5 | 6.5–7 |
| Refractive index | 1.925–1.984 | 1.66 |
| Specific gravity | 4.69 | 3.34 |
| Crystal system | Tetragonal | Monoclinic (aggregate) |
| Birefringence | 0.059 | Not usually measurable |
Values are typical ranges from standard gemmological references; individual stones can vary.
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