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An opal is considered to be a mineraloid, meaning that it has all of the properties of a mineral-- solid, inorganic, naturally forming, has a chemical composition-- but does not demonstrate crystallinity. Other examples of mineraloids include obsidian, an amorphous glass (that is not a crystal).

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16y ago

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Is opal a type of rock?

Its a rock. Just a shiny one.


Is a opal a sedimentary rock?

yes


What does a Opal rock look like?

Opal is a unique gemstone that typically exhibits a play-of-color, displaying vibrant flashes of various hues, including red, blue, green, and yellow, as light interacts with its internal structure. The stone can appear translucent to opaque and often has a smooth, rounded surface. Common opal types include white, black, and boulder opal, each showcasing different backgrounds and patterns. Its overall appearance can range from a milky or cloudy look to a more vivid, iridescent effect depending on the quality and type of opal.


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Is an opal a rock?

No, it's actually a form of silica.


What type of rock is geyserite?

Geyserite is a type of rock that is formed by the precipitation of silica from hot spring water, typically around geysers and hot springs. It is composed mainly of siliceous material and resembles opal or chalcedony in appearance.


What type of punk is green day?

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Is diatomite an example of opal silica?

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