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Opal is a form of silica, amorphous and hydrated: SiO2.nH2O.

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7y ago

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What is another name for opal?

Another name for opal is "fire opal."


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.


What chemical formula is opal made from?

Opal is a mineraloid gel. It is made, oddly enough, almost entirely of opal. It is also completely free of birefringence, and has virtually no pleochroism. Opal is basically silica. Saying opal is made of opal is like saying quartz is made of quartz, or tiger eye is made of tiger eye. It's the unique structure of the silica that makes it become opal. The Japanese have made a nice man made opal using silica and zirconium oxide. Si02nH20


What is the birthstone for October?

October's birthstone is the opal. The opal is thought to have the power to predict illness. This is because the opal responds to heat.


How is opalite made?

Opalite is the name for a few fairly different things:"Tiffany Stone"/"Ice Cream Opal"/"Purple Opal": a natural stone, purple, composed largely of dolomite and fluorite, but sometimes with a mix of other minerals as well.Low-grade natural opal without the play of colour for which opal is known.Opalite glass: Treated glass, generally blue with hints of peach, luminous. Manmade, obviously.I think that there's also a kind of plastic-based imitation opal with the trade name Opalite, but I'm not sure.It's a little frustrating that such different things all have the same name, isn't it?