
Aluminum silicate containing fluorine and oxydriles; it crystallizes in the orthorhombic system
General Physical properties: hardness 8 - density from 3.52 to 3.56 g/cm3 - refractive indexes approximately 1.610 and 1.618 or 1.630 and 1.638
- Weight: 20.08 Kt
- Size 20.00 x 15.20 x 9.30 mm
- Cut: mix, oval shape
- Color: intense light blue
- Purity: pure
- Treatments: irradiation
- Origin: Brazil