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Is an opal a rock

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Anonymous

12y ago
Updated: 8/20/2019

No, it's actually a form of silica.

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Wiki User

12y ago

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Is a opal a sedimentary rock?

yes


Is opal a type of rock?

Its a rock. Just a shiny one.


Is Fire Opal a rock or a mineral?

Neither. Opal is a mineraloid, as it does not have a sufficiently organized structure to be considered a mineral.


Is opal a sedimentary igneous or metamorphic rock?

igneous


Is fire opal an ignuos rock?

Fire opal is not an igneous rock; it is a mineraloid form of opal, primarily composed of silica. While it can form in volcanic environments, it is classified as a gemstone rather than a rock type. Fire opal is known for its vibrant colors and play of color, which result from its unique internal structure rather than crystallization like igneous rocks.


How does opal fit in the rock cycle?

Opal is amorphous mineraloid, occurrence : Sedimentary and secondary from the alteration of high silica igneous extrusive rocks


Valuable rock start with o four letter word?

opal


Is opal an intrusive or extrusive mineral?

Opal is not considered a rock but actually a mineraloid gel. It is deposited at relatively low temperatures. One of the characteristics if igneous rocks, sometimes called fire rocks, is that they are formed at high temperatures. Whether an igneous rock forms below ground, or on or near the surface, it's all about heat forming the rock. Opal cannot take its form under that kind of heat.


How made opal ware?

Opals are a mined substance that can be found in fissures in rock. It is then processed, cleaned up and cut down to make different types of jewelry. This is how opal ware is made.


What stones are similar to opal?

Stones similar to opal include labradorite, which exhibits a play of color known as schiller, and moonstone, known for its adularescence and shimmering effect. Other alternatives are fire opal, which displays vibrant colors, and boulder opal, featuring the host rock integrated with the opal. Additionally, synthetic opals, created in labs, mimic the appearance of natural opals but are more uniform in color.


Is opal a sedimentary igneous and metamorphic rock?

Opal is neither a sedimentary, igneous, nor metamorphic rock. It is actually a mineraloid composed of hydrated silica that is formed from silica-rich solutions at low temperature, often found in sedimentary rocks like sandstone or volcanic areas.


Are there different kinds of opal?

The types of Opal that i am familiar with are White Opal, Fire Opal, Boulder Opal, Black Opal, Crystal Opal, Light Opal, Doublet Opal, Triplet Opal, Common Opal, Synthetic Opal, and Immitation Opal.