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> Cubic zirconia [synthetics]
Cubic zirconia [synthetics] — specimens [gallery view]
A cubic crystalline form of zirconium dioxide (ZrO
). A dense substance, with a specific gravity 5.6—6.0; relatively hard, 8—8.5; refractive index high at 2.15—2.18; dispersion very high at 0.058—0.066, exceeding that of diamond (0.044).
Cubic zirconia [synthetics] — specimens — 1
Gemmology — gemstones
National Museum of Natural History, Sofia
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None of the specimens illustrated in this site is on display in the permanent exhibition of the National Museum of Natural History, Sofia.