Mooie Labradoriet 6x4.5 mm Peer ± 0.50 CT. Clarity: Transparent Hardness: 6 - 6.5 Specific Gravity: 2.70 - 2.74 Refractive Index: 1.55 - 1.75 Chemical Composition: CaNa(Al,Si)AlSi2O8, Calcium Sodium Aluminum Silicate Crystal Structure: Triclinic Treatment: None
