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Opal - Wikipedia The internal structure of precious opal causes it to diffract light, resulting in play-of-color Depending on the conditions in which it formed, opal may be transparent, translucent, or opaque, and the background color may be white, black, or nearly any color of the visual spectrum
Pictures of Opal - Black, Fire, Boulder, Blue and Pink Photos of opal from around the world Guidance for people who want to buy opal, see different types of opal, understand their names, learn about synthetics and imitations
Opal - Gemological Institute of America An opal might show a single color, two or three colors, or all the colors of the rainbow! The best play-of-color is the brightest; if it also has all the rainbow colors, then it is very rare and valuable
Opal | Properties, Types Uses | Britannica Opal, silica mineral extensively used as a gemstone, a submicrocrystalline variety of cristobalite In ancient times opal was included among the noble gems and was ranked second only to emerald by the Romans
Opal - International Colored Gemstone Association October’s birthstone, opal is a gem of positive transformation, revealing the colorful attributes of those who wear it Magical, mysterious, and lively—opal is captivating new admirers with its variety
What Is Opal: Everything You Need to Know - Nobbier What Is Opal? Opal is a hydrated amorphous form of silica (SiO₂·nH₂O) containing between 3-21% water within its mineral structure Unlike crystalline gemstones that have orderly, repeating atomic structures, opals form from silica-rich solutions that flow into cracks and cavities in rock
Opal: The Play-of-Color Gem – Formation and Symbolism Opals come in a variety of hues and types, each with its own geological formation process and cultural significance In this article, we will explore the science behind opal formation, its different types, and the symbolism it holds in various cultures
Opal Gemstone Information: Varieties, Colors, Care, and More Explore comprehensive opal gemstone information covering varieties like black, fire, and boulder opals, their colors and patterns, historical significance, care tips, and symbolic meanings for enthusiasts and buyers