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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. List of refractive indices - Wikipedia

    en.wikipedia.org/wiki/List_of_refractive_indices

    Printable version; In other projects Wikidata item; Appearance. move to sidebar hide ... Cubic zirconia: 2.15–2.18 [32] Potassium niobate (KNbO 3) 2.28: Zinc oxide ...

  4. Refractive index - Wikipedia

    en.wikipedia.org/wiki/Refractive_index

    Print/export Download as PDF; ... Cubic zirconia: 2.15 Diamond: 2.417 Moissanite: 2.65 ... The blue color is more deviated (refracted) than the red color because the ...

  5. 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 ...

  6. Zirconium - Wikipedia

    en.wikipedia.org/wiki/Zirconium

    The most common oxide is zirconium dioxide, ZrO 2, also known as zirconia. This clear to white-coloured solid has exceptional fracture toughness (for a ceramic) and chemical resistance, especially in its cubic form. [37] These properties make zirconia useful as a thermal barrier coating, [38] although it is also a common diamond substitute. [37]

  7. Mortgage and refinance rates for Dec. 17, 2024: Average ... - AOL

    www.aol.com/finance/mortgage-and-refinance-rates...

    See today's average mortgage rates for a 30-year fixed mortgage, 15-year fixed, jumbo loans, refinance rates and more — including up-to-date rate news.

  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. Yttria-stabilized zirconia - Wikipedia

    en.wikipedia.org/wiki/Yttria-stabilized_zirconia

    Yttria-stabilized zirconia (YSZ) is a ceramic in which the cubic crystal structure of zirconium dioxide is made stable at room temperature by an addition of yttrium oxide. These oxides are commonly called "zirconia" ( Zr O 2 ) and "yttria" ( Y 2 O 3 ), hence the name.

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