Jaspis (Picture) Weight: 32.93 CT. Size: 28x20 mm Shape: Oval Cabochon Color: Funky Color Clarity: Opaque Luster: Good Polish with Fine Glow Origin: Africa Hardness: 7 Specific Gravity: 2.65 - 2.91 Refractive Index: 1.544 - 1.553 Chemical Composition: SiO2, Silicon Dioxide Crystal Structure: Trigonal