What is opal? is opal gem stone?
As gems for jewelry use, most opal is cut and polished to cabochon shape. Natural opal refers to polished stones consisting wholly of precious opal. Opals too thin to produce a “Natural” opal may be combined with other stones to form compound gems.
An opal doublet consists of a relatively thin layer of precious opal, backed by a layer of darker color stone, such as ironstone, onyx or obsidian.
The darker backing results in a more attractive display for the opal than itself without backing.
To protect the opal itself, a clear quartz or plastic is usually layered on its top to form an opal triplet,
the top protective layer magnifies the beautiful color of the opal.
The name OPAL is said that comes from Sanskrit word “upala”which means precious jewelry, also it is believed to be derived from Greek word derivative opállios means stone with colorful changes.
Synthetic or cultured opals are lab-created opals that have the same chemical composition, internal structure, physical properties, and appearance as natural opals
Synthetic opals colors often looks more beautiful than many of natural grecious opals.
Most genuine previous opals have an irregularity in apperance.
women opal ring bandLab-grown opals looks almost same as natural opal, even well-trained gemologists can hardly distinguish between them.
But sellers has the obligation to indicate whether it is natural or synthetic.
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