Location: 55 km north of Meimeh.
Stone type: Crystal.
Color: Gray .
Apparent specific gravity: 2.72 tons per cubic meter.
Moisture absorption coefficient: 0.3%
Pressure resistance: 943 kg/cm3.
Weight loss against abrasion and heat: 0.98%
Modulus of elasticity: 10 # 2.49 kg/cm3.
Abrasion percentage: 34.2%
Extraction method: mechanized (diamond wire-cutting machine).