| Property |
Specification |
| Chemical Composition |
Beryllium Aluminum Silicate (Be3Al2(SiO3)6) |
| Color |
Green (varies from light to dark green) |
| Hardness (Mohs scale) |
7.5 to 8 |
| Density |
2.67 to 2.78 g/cm³ |
| Crystal System |
Hexagonal |
| Refractive Index |
1.57 to 1.60 |
| Cleavage |
Imperfect (in two directions) |
| Transparency |
Transparent to translucent |
| Luster |
Vitreous (glassy) |
| Fracture |
Conchoidal (smooth, curved surfaces) |
| Inclusions |
Commonly contains inclusions, known as "jardin" (garden) |
| Shape |
Irregular to ovoid, depending on the rough specimen |
| Size |
Varies (from small fragments to large boulders) |
| Color Intensity |
Dependent on origin, typically more intense from Colombia |
| Origin |
Mainly found in Colombia, Zambia, Brazil, and Afghanistan |
