sábado, 9 de febrero de 2013

NATURAL ZIRCON AND CUBIC ZIRCONIA

These two gemstones can be easily confused and many people don't know their differences.

NATURAL ZIRCONS

A natural zircon is composed of zirconium silicate found naturally in colors such as yellow, orange, blue, red, violet, brown, green and colorless.  This latter one can be similar to a diamond, although its hardness is only 7-7.5, while diamond is 10.  Natural zircons have a stunning optical luster and.are perfect for jewelry, except for rings as they are soft and not too durable, being easily chipped or scratched.  They are a good inexpensive substitute for diamonds in most jewelry items except for rings.

CUBIC ZIRCONIA

Cubic zirconia is a synthetic gemstone created by German and Russian scientists.  It is a mixture of zirconium oxide and yttrium oxide, melted together at extremely high temperatures (2750 C).  It is crystalline, colorless and flawless and sparkles brighter than crystal and is harder than the majority of gemstones (8.5).  Due to its beauty and low price, it has become very popular in jewelry.  It is perfect for epoxy pavés.

LUZ MINERVA only uses natural zircons.

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