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Is opals is solid in solid solution?
Opals are a form of solid solution where silica spheres are arranged in a regular pattern within a matrix. This structure causes the diffraction of light, resulting in the play of color that opals are known for.
How deep are opals underground found?
Opals are typically found within 30 meters (about 100 feet) underground. They form in cavities and fissures in sedimentary rocks, such as sandstone and limonite. Due to their formation process, opals are usually found in shallow depths compared to other gemstones.
Who made opals?
Nobody MADE opals. They're mined out of the ground.
Are opals made from volcanoes?
The volcano itself does not make the opal. The lava, be it Rhyolite or Basalt has air bubbles in it (called vesicles) these air pockets of many differing sizes are the future home of the opals. After time wheh the lava cools any silica rich springs begin a slow deposition of silica which, if the conditions a correct, will form common and precious opal. The volcano creates the matrix (or host rock) of the opal.
What are food uses of opals?
Opals cannot be used as foods. They are hard, precious stones.
Do opals actually make you invisible?
Neither opals or any other gemstone will make you invisible.
Are opals black?
Some opals are known as black opals, this is when they have a mainly black colour. In general a black opal is very dark blue and has flecks of other colours within
Are opals natively Australian?
No. When opals were first found in Australia, they were not thought to be opals because they were a milky white in appearance. Opals found elsewhere in the world were mostly black.
Why are opals amorphous?
Opals are amorphous because they lack a crystalline structure. Their formation involves the precipitation of silica spheres in a disordered arrangement, which gives opals their unique play-of-color appearance. This lack of a crystal lattice is what differentiates them from most other gemstones.
Can you melt an opal?
No, opals are a type of mineraloid composed of silica spheres. Opals are sensitive to heat and can crack or lose their play-of-color if exposed to high temperatures. It is not recommended to try melting opals.
Where can black opals be found in NSW?
Three different types of Opal are found in Australia:Fire Opals are mined in South Australia near Coober Pedy.Black Opals are mined in New South Wales near Lightning Ridge.Boulder Opals are mined in the western Queensland.
Are green opals magnetic?
No, green opals are not magnetic. Opals, including green opals, are primarily composed of silica and water, which do not exhibit magnetic properties. If a green opal is attracted to a magnet, it may contain traces of iron or other magnetic minerals, but the opal itself is not inherently magnetic.
