Jaspis (Dalmatier) Approx Weight: 0.45 CT. Size: 6x4 mm Shape: Oval Cabochon Color: Dalmatian Color (White with Black Spots) Clarity: Opaque Luster: Good Origin: Mexico Hardness: 7 Specific Gravity: 2.65 - 2.91 Refractive Index: 1.544 - 1.553 Chemical Composition: SiO2, Silicon Dioxide Crystal Structure: Trigonal