Chemistry: Hydrated borate of calcium and sodium
Crystal system: Monoclinic; fibrous.
Color: Transparent to translucent; white.
Hardness: 1 - 2
Cleavage: Perfect; Fracture: fibrous.
Specific gravity: 1.65 – 1.99
Refractive index: 1.51 mean; 0.029
Luster: Vitreous.
Dispersion:-
Dichroism: -
Occurrence: USA
Notes
Collectors stone; also known as Television Stone, for if a slab is polished with both faces at right angle to the fibers, it will transmit image as per fiber optics; used to make imitation cat’s eye effect assembled stones; fluorescence: blue green (SW); may phosphoresce.
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