![]() ![]() Featuring such a spectacular array of colours and patterns, it can seem like there are endless types of Australian opals out there. If the cabochon is flat, it could break easily, especially if it is going to be set into jewelry. The best color play is on domed surfaces, which also make the stone look bright from most angles. If it's a cabochon, the top of the dome should be smooth. How Can You Tell A Good Quality Opal?Ī good opal should have a cut that is even on both sides. Opals of any body color can be opaque, translucent, or see-through. Body Tone: The base tones of light, dark, and black opal range from colorless, and white, through the different shades of grey, to black. The two things that make natural opal different are its body tone and how clear it is. The following types of opal patterns are covered: This material, which can change colors, is also called "Mexican opal" or "Mexican fire opal" in the trade. Even though fire opal is often wrongly called a "mineral," it is not one because it doesn't have its own crystalline structure.įire opal is either clear or slightly see-through, and its body color is usually yellow, orange, or red. Boulder And Matrix Opalįire opal is an amorphous mineraloid made up of tiny hydrated silica spheres that reflect most of the light in a reddish-orange spectrum. Even though boulder opal is backed by ironstone, it is still considered a solid natural opal because the ironstone backing is a natural feature. Most of the time, natural opals are called light, dark or black, boulder, or matrix. Opals that have not been changed in any way from their natural condition, other than the fact that they have been shaped and polished into a gem. The body tone and transparency of a natural opal are the two features that are used to classify the different types. ![]() Opals seen in nature are usually classified as either light, dark or black, boulder, or matrix.Įven though boulder opal has a backing made of ironstone, it is still considered to be a natural solid opal because the ironstone backing is formed by natural processes. Opals are considered to be natural if they have not been changed or improved by human help in any way, with the exception of being cut and polished. Different Types Of Opal Natural Opal GemstoneĪ blue opal stone that is still coneted on its host rock The color of common opal ranges from opaque to translucent and is described as having a brownish-orange color nevertheless, it can come in any color and many of those colors are highly appealing. What Is The Difference Between Precious And Common Opal?Ĭommon opal does not show the dance of spectral colors that is characteristic of precious opal, which can be seen throughout the stone. It was often worn as a charm to bring about loyalty and trust. In the past, opal was thought to be a stone of loyalty and trust. What is an opal a sign of? Opals have traditionally stood for hope, purity, and the truth, and the 14th wedding anniversary gift is an opal. It Also Symbolizes Something That Will Benefit You #TYPES OF OPAL PLUS#SiO2 plus H2 O is the symbol for chemistry. Very valuable in its "black" form and has a good amount of water in it. What Is Opal - Gemstone Facts and InformationĪn explanation of what opal is: "An amorphous, non-crystalline gem mineral that solidified from gelatinous or liquid silica that was left behind by decaying plants, wood, crustaceans, and bones." ![]()
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