Fluorite

Color: Colorless, yellow, green, blue, pink, purple, red and orange
Moh’s Hardness: 4
Refractive Index: 1.434
Critical Angle: 44.37°
Specific Gravity: 3.18
Cleavage: Perfect in 4 directions
Fracture: Even to conchoidal, brittle
Dispersion: Very low (.007)
Heat Sensitivity: High, in my experience
Birefringence (double refraction): None
Crystal Structure: Isometric

Treatments: Generally none, sometimes can be irradiated.

What I prefer to polishing with: Flourite is not something I cut, recommended polishes are wax lap with Alumina or tin oxide or chrome oxide Ultralap. Orient the table about 10 degrees off the crystal face to reduce cleavage problems.

Jeff's Comments: Cuts pretty easily, and can be a tough to polish. Watch the heat when dopping... Typically has silk and cleavage problems

Design Notes: About any designs will work well...

Rough Links:
Flourite - Wise mine (Westmoreland, New Hampshire, USA) blue/green Flourite

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E-mail to inquire or order: jeff@faceters.com