Scapolite Facet / Faceting Information
Color: Yellow, purple, pink, colorless, greenish
Moh’s Hardness: 5-6
Refractive Index: 1.54-1.56
Critical Angle: 40.49°
Specific Gravity: 2.57-2.74
Cleavage: Perfect in 2 directions
Fracture: Conchoidal, brittle
Heat Sensitivity: Moderate
Birefringence (double refraction): Weak to medium (.009-.020)
Crystal Structure: Tetragonal
Treatments: Generally none, but Purple may be irradiated and/or heat treated
What I prefer to polishing with: Alumina oxide on a Tin lap, Spectra Ultralap
Jeff’s Comments: Heat during dopping can cause problems. Orientate for best color which is often the “c” axis. Use a medium fine lap for roughing in.
Design Notes: About any Quartz design will work well.
Design Links: Prince -This will work nicely