Mohs hardness: 7.

Quartzite jade density: 2.64g/cm 3 ~ 2.71g/cm 3

Photographic characteristics: heterogeneous aggregates.

Refractive index: 1.544 ~ 1.533, the point method is usually 1.54.

Birefringence: not measurable.

Ultraviolet fluorescence: generally absent; quartzite containing chrome mica: no weak, grayish green or red.

Absorption spectrum: non-characteristic, quartzite containing chrome mica: can have 682nm, 649nm absorption band.

Dyeing treatment: It can be dyed into various colors, and the magnification of the visible dyes can be distributed between the particles. Green-stained quartzite shows a 650 nm absorption band.

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