Petra Asia Ltd
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Biron created emerald
品牌名称:
Petra
宝石颜色:
Light Green
描述
联络供应商
描述
- Chemical composition: Be3Al2Si6O18
- Symmetry: hexagonal
- Hardness (Mohs scale): 7.5-8.0
- Density: 2.67-2.75
- Refractive index: 1.578 - 1.572
- Dispersion (C-F): 0.014
- Heat resistance: up to 1250°C/2282°F
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