Petalite Approx Weight: 0.65 CT. Size: 5 mm Shape: Round Cut Color: Top White Clarity: Clean Luster: Good Origin: Brazil Hardness: 6 - 6.5 Specific Gravity: 2.3 - 2.5 Refractive Index: 1.50 - 1.52 Chemical Composition: Li(AlSi4O10), Lithium Aluminum Silicate Crystal Structure: Monoclinic Treatment: None
