Item Name: | loose gemstone pear shape hydrothermal emerald stone |
Material: | hydrothermal emerald |
Color: | Emerald green |
Type: | Colombia emerald |
Types Provided: | Colombia Emerald/Zambia Emerald |
Hardness: | 7.5 |
Shape/Cut: | Pear Cut |
Clarity: | Transparent |
Size Provided: | 3*5mm, 4*6mm, 5*7mm, 6*8mm, 7*9mm, 8*10mm, 10*12mm or Customized |
Weight: | According to the size |
Shapes Provided: | Round Pear Oval Marquise Cushion Emerald Heart or Customized |
Delivery Time | Existing Size/Shape: 2-3 days. Customized Order: 5-15 days |
Cut Method | Hand Cut or Machine Cut |
Properties | Created Emerald | Natural Emerald | ||||
Chemical Composition | Be3Al2[Si6O18] | Be3Al2[Si6O18] | ||||
Crystal System | Hexagonal System | Hexagonal System | ||||
Hardness | 7.5-8 | 7.5 | ||||
Transparency | Transparent | Transparent | ||||
Refractive Index | 1.570-1.577 | 1.565-1.598 | ||||
Birefringence | 0.007 | 0.005-0.008 | ||||
Specific Gravity | 2.70 | 2.65-2.70 | ||||
Melting Point | 1410℃ | 1410℃ |