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Cubic Zirconia Gemstone Information

Cubic Zirconia occurs naturally but is very rare. The manufactured material is therefore synthetic and was introduced to the market as a diamond simulant, often referred to as simply 'CZ'. It has impressive gemstone properties including a dispersion level higher than that of diamond and a bright vitreous lustre. Rough material is cheap to purchase and features a wide colour range that is continuously expanding.

Cubic zirconia is often confused with the natural gemstone zircon because of a similar description. Zircon is a silicate (zirconium silicate, ZrSiO4) whereas CZ is an oxide (zirconium dioxide, ZrO2) they are therefore unrelated.

Physical Properties

Stone type:
Manufactured (synthetic) material
Crystal System:
Cubic (isometric)
Chemical Composition:
ZrO2
Colour:
Colourless, pink, blue, brown and other colours in various shades
Lustre:
Bright vitreous
Pleochroism:
none
Dispersion:
High, at 0.058 to 0.066 (diamond is 0.044)
Hardness:
8 to 9 on the Mohs' scale
Toughness:
Good
Cleavage:
None
Density in gm/cc:
5.6 to 6.0
Double refraction:
None
Refractive index:
2.17

Common Treatments

CZ is not normally treated.


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