Rough opal can have a dull, pearly, waxy, or vitreous luster. The play-of-color of precious opal displays spectral colors of red, orange, yellow, green, blue, and violet. Some of the most beautiful common opals are red, orange, pink, green,or blue. Therefore opal is a " mineraloid" rather than a " mineral."Ĭommonly having a bodycolor of white, yellow, gray, black, or brown however, the bodycolor of opal can be any color. It is amorphous, without a crystalline structure, and without a definite chemical composition (it contains a variable amount of water, as shown by the "n" in its chemical composition). Mineralogically, opal is a hydrous silicon dioxide with a chemical composition of SiO 2. It can be surprisingly beautiful! Common Opal has color, pattern and beauty that can be anything but common. If you are just starting to learn about opal, here are three varieties that might surprise you: Fire Opal is known for its intense red, orange and yellow colors - the colors of a fire! Boulder Opal is opal with attached host rock.
There are many types of opal found in deposits around the world. The best opals command prices per carat that rival expensive diamonds, rubies, sapphires, and emeralds. A nice precious opal can flash every color of the spectrum with an intensity and quality of color that surpasses the fire of diamond. Opal is one of the world's most popular gemstones and the birthstone for the month of October. VIDEO: The Life of an Opal: Justin at shows you the journey of an opal, from mine to workshop to finished gem.
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