Natural Emerald | Lab Grown Zambian | Lab Grown Colombian | |
---|---|---|---|
Chemical formula | Be3Al2Si6O18 | Be3Al2Si6O18 | Be3Al2Si6O18 |
Crystal system | Hexagonal | Hexagonal | Hexagonal |
Mohs' hardness | 7,5-8 | 7,5-8 | 7,5-8 |
Density (g/cm3) | 2.6-2.8 | 2.6-2.8 | 2.6-2.8 |
Refraction index | 1.57-1.58 | 1.57-1.58 | 1.57-1.58 |
Color | Green | Medium dark green | Bluish-green |
Inclusions | With some inclusions inside | With some inclusions inside | With some inclusions inside |
Width of crystal | 10-15 mm | 3-8 mm | 5-12 mm |
Length of crystal | 20-50 mm | 60-100 mm | 60-100 mm |