Gemmology
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Cubic zirconia [synthetics] — specimens [gallery view]


A cubic crystalline form of zirconium dioxide (ZrO2). 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
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