Black
Diamond Faceted Cut
AAA
Heat resistant up to 900F
These midnight black cubic zirconia gems are truly dramatic, with a dense opaque true black colour, not often seen in a faceted cut. They have an incredibly bright, eye-catching mirror finish, reminiscent of the sheen of black diamonds (though without the price tag!). These super sparkly gems would be work equally well in contemporary or vintage styled jewellery.
Cubic Zirconia (or CZ) is zirconium oxide (ZrO2 ), is widely synthesized for use as a diamond simulant and it is a lab made created stone with a specific gravity of between 5.6-6.00 and at about 7.5 hardness on Mohs scale, which is harder than most natural gems.
Its refractive index is high at 2.15 - 2.18 (B-G interval) and its luster is very good.
Its dispersion is very high at 0.058 - 0.066, exceeding that of diamond (0.044).
