Yellow Gemstones |
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Gemstone | Crystal System | Density | Hardness | Refractive index | Treatments |
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microcrystalline | 2.66 | 6.5-7.0 | 1.544-1.553 | dying |
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amorphous | 1.08 | 2.0-2.5 | 1.54 | heating, oiling, reconstitution |
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hexagonal | 2.72 | 7.5-8.9 | 1.577-1.583 | heat, radiation, fracture filling, oiling |
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microcrystalline | 2.66 | 7 | 1.544-1.553 | dying |
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orthorhombic | 3.72 | 8.5 | 1.746-1.755 | heat, radiation |
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hexagonal | 2.66 | 7.0 | 1.544-1.553 | heat |
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cubic | 3.52 | 10 | 2.417 | radiation, drilling, fracture filling |
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microcystalline | 3.34 | 6.5-7.0 | 1.660-1.680 | dying |
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amorphous | 2.15 | 5.0-6.5 | 1.450 | fracture filling |
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hexagonal | 4.00 | 9 | 1.762-1.770 | heat, fracture filling |
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hexagonal | 2.66 | 7.0 | 1.544-1.553 | none |
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cubic | 3.60 | 8 | 1.718 | none |
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microcrystalline | 2.64-2.71 | 7.0 | 1.540-1.550 | none |
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orthorhombic | 3.53 | 8.0 | 1.619-1.627 | blue is irradiated |
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trigonal | 3.06 | 7.0-7.5 | 1.624-1.644 | heat |
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tetragonal | 4.00 | 6.50 | 1.810-1.815 | heat |