Lustre (mineralogy)
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Lustre or luster is the way light interacts with the surface of a crystal, rock, or mineral. The word traces its origins back to the Latin lux, meaning "light", and generally implies radiance, gloss,
Cut diamonds
Kaolinite
Moss opal
Pyrite
Cubic zirconia
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Cubic zirconia is the cubic crystalline form of zirconium dioxide. The synthesized material is hard and usually colorless, but may be made in a variety of different colors. It should not be confused w
Lustre (mineralogy)
…and have a high refractive index (of 1.9 or more). Minerals with a true adamantine lustre are uncommon, with examples including cerussite, zircon, and cubic zirconia. Minerals with a lesser (but still relatively high) degree of lustre are referred to as subadamantine, with some examples being garnet and corundum…
Worker monitoring melting zirconium oxide and yttrium oxide in an induction-heated "cold crucible" to create cubic zirconia
Purple cubic zirconia with checkerboard cut
Multi-color cubic zirconia