- Written By: R. Kayne
- Edited By: Niki Foster
- Last Modified Date: 03 December 2011
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2003-2012 Conjecture Corporation
Cubic zirconia is a synthetic gemstone that very closely resembles diamonds. Because of its startling diamond-like appearance and inexpensive price tag, cubic zirconia is a highly popular gemstone used most frequently in jewelry such as rings, earrings, bracelets and pendants. Although cubic zirconia is synthetic, it is inspired by its natural counterpart, zirconium oxide (ZrO2), first discovered in 1892 but too rare to be commercially profitable. Through a series of separate experiments by German and Soviet scientists, zirconium oxide and yttrium oxide were eventually melted together at temperatures reaching 4,982ºF (2,750ºC) to grow cubic zirconia crystals in the laboratory.
Cubic zirconia is crystalline, flawless, and clear enough to rate a "D" on the diamond scale for color. Though usually colorless, it can also be made in nearly any color, including soft yellow, characteristic of some diamonds. Cubic zirconia sparkles brighter than crystal and is harder than most gems, making it very durable. It also weighs about 65% more than diamond. However, if there is an obvious difference between the two to the untrained eye, it is that cubic zirconia has a higher dispersion rate than diamond.
In the case of gemstones, dispersion refers to the ability of a mineral to split light into separate wavelengths, creating prism-like colors or "fire." Because cubic zirconia has a higher dispersion rate than diamond, when light shines on cubic zirconia, it brilliantly sparkles with many different colors refracted in its crystalline structure. Though very attractive, it "outshines" a diamond in this sense, potentially giving itself away. Efforts continue to be made by some manufacturers of cubic zirconia to render the gem even more diamond-like. It is already so close in appearance that, in some instances, a jeweler's loupe is necessary to tell it from a high-quality diamond.
While a cubic zirconia wedding band might not have the same "ring" as diamond, it is a great alternative for affordable, yet beautiful jewelry. Perhaps the best person to buy a cubic zirconia gift for is yourself. Splurge on the "diamond" ring you've always wanted, or that beautiful bracelet. You can wear it out on the town without worrying about its dollar value, but still looking like a million bucks.
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PurpleSpark
Post 6 |
@calabama71: Also, cubic zirconia is softer than moissanite. There is a way to test the hardness of a stone. It’s called the Mohs scale. Diamonds rate as a 10. Cubic zirconia rates as 8.25 and moissanite is around a 9.
Moissanite is said to have more brilliance than cubic zirconia and is more expensive.
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dill1971
Post 5 |
@calabama71: Whereas, moissanite and cubic zirconia are both diamond substitutes, they do have variations.
As the article stated, CZ is made by melting zirconium oxide with another metal oxide. Moissanite, however, is a silicon carbide. They do both exist in natural states but are pretty hard to find.
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calabama71
Post 4 |
Are cubic zirconia and moissanite the same thing? |
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chrisinbama
Post 3 |
@wesley91: Many years ago, before we had more modern, stronger stones, the “scratching glass” tests were somewhat effective. Diamonds are so strong that they will, indeed, cut (or at least scratch) glass. However, most of the modern diamond simulants (including cubic zirconia) are just as effective at scratching glass.
This test is no longer considered effective due to that fact.
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wesley91
Post 2 |
Is it true that one way to tell the difference in a cubic zirconia and a diamond is that a diamond can cut glass? |
