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Vaibhav Singh posted an Question
April 21, 2021 • 22:42 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
Why opal becomes partly crystalline with geologic time??do all mineraloids become partly crystalline with geologic time?? if not,then why only opal?
Why Opal becomes partly crystalline with geologic time??Do all mineraloids become partly crystalline with geologic time?? If not,then why only Opal?
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Sajan sarthak Best Answer
Opal is by far sited as one substance which is partly crystalline. That's why it's pronounced as mineraloid...that directly doesn't mean it's a mineral because for being a mineral solid, naturally occurring, homogeneous, crystalline substance is passed ....in local term opal may be crystalline but it's not actually. other mineraloid is not at all crystalline.
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Sajan sarthak
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Precious opal displays play-of-color (iridescence), common opal does not.Play-of-color is defined as "a pseudo chromatic optical effect resulting in flashes of colored light from certain minerals, as they are turned in white light."The internal structure of precious opal causes it to diffract light, resulting in play-of-color. precious opal does have some internal structural arrangements. so it's mineraloid .
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I do nat understand where you answered my Question. Sir
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Vaibhav singh
Sir ..I need one more clearance ----Q. Sir Are Precious Opals and Common Opals are types of Minerlaoid Opal. Why Precious opal is called precious?? Can I say because precious opal show pkay of colors hence it is precious??