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  2. Cubic zirconia - Wikipedia

    en.wikipedia.org/wiki/Cubic_zirconia

    Cut: Cubic zirconia gemstones can be cut differently than diamonds: The facet edges can be rounded or "smooth". Color: only the rarest of diamonds are truly colorless, most having a tinge of yellow or brown to some extent. A cubic zirconia is often entirely colorless: equivalent to a perfect "D" on diamond's color grading scale. That said ...

  3. Gemology - Wikipedia

    en.wikipedia.org/wiki/Gemology

    Gem identification is basically a process of elimination. Gemstones of similar color undergo non-destructive optical testing until there is only one possible identity. Any single test is nearly always only indicative. For example: The specific gravity of ruby is 4.00, glass is 3.15–4.20, and cubic zirconia is 5.6–5.9 . So one can easily ...

  4. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Cubic zirconia; Lab diamond; Lab emerald; Fordite; Gadolinium gallium garnet; Lab moissanite; Synthetic opal; Metal-coated crystals hyped as rainbow quartz; Lab spinel;

  5. Gemstone - Wikipedia

    en.wikipedia.org/wiki/Gemstone

    Examples of simulated or imitation stones include cubic zirconia, composed of zirconium oxide, synthetic moissanite, and uncolored, synthetic corundum or spinels; all of which are diamond simulants. The simulants imitate the look and color of the real stone but possess neither their chemical nor physical characteristics.

  6. Zirconium dioxide - Wikipedia

    en.wikipedia.org/wiki/Zirconium_dioxide

    Visually discerning a good quality cubic zirconia gem from a diamond is difficult, and most jewellers will have a thermal conductivity tester to identify cubic zirconia by its low thermal conductivity (diamond is a very good thermal conductor). This state of zirconia is commonly called cubic zirconia, CZ, or zircon by jewellers, but the last ...

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  8. Diamond simulant - Wikipedia

    en.wikipedia.org/wiki/Diamond_simulant

    Its low cost and close visual likeness to diamond have made cubic zirconia the most gemologically and economically important diamond simulant since 1976.. A diamond simulant, diamond imitation or imitation diamond is an object or material with gemological characteristics similar to those of a diamond.

  9. New Year's resolutions for pet owners to make (and keep!) in 2025

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    To help, we've compiled a list of the best travel destinations for dogs and written a guide on tips for traveling with pets, which uncovers all the need-to-know dos before booking an extra ticket ...

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