The Very Highest Quality Thortveitite Information. . . |
Thortveitite |
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Technical Details
Chemical Composition and Name | (Sc,Y)2Si2O7 - Scandium Yttrium Ailicate | |
Hardness | 7 (estimated) | |
Specific Gravity | 3.48 | |
Refractive Index (R.I.) | 1.753 - 1.809 | |
Bi-refringence | 0.056 | |
Optic Sign | Negative | |
Optical Character | Biaxial |
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