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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.
Wiki User
∙ 13y ago
Wiki User
∙ 10y agoNo. Opals form from silica dissolved in hot water.
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What are fire opals made of?
Fire opals are unique in the lush world of the opals. They were already admired as symbols of the most fervent love in ancient times, in India and in the ancient Persian kingdom, and among the peoples of Central America and the Amerindians.
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.
What is a good universal statement about volcanoes?
all volcanoes are made of rocks
What is the melting point of an opal?
It depends what its made from. Natural opals made from silica have a high melting point around ~1600 celsius. These are common structures in research as silica spheres are easy to make with the stober method and form opals using the colvin method. The other 2 common types of opals created synthetically are PMMA, polystyrene. Polystyrene melts areound 120 celsius, PMMA melts at 160 celsius.
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
Who made opals?
Nobody MADE opals. They're mined out of the ground.
What is the necklace that cursed Katie Bell made of?
opals
What are fire opals made of?
Fire opals are unique in the lush world of the opals. They were already admired as symbols of the most fervent love in ancient times, in India and in the ancient Persian kingdom, and among the peoples of Central America and the Amerindians.
Where are volcanoes made?
All volcanoes are made of gas and magma.
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.
Is it true that Hawaii is made out of volcanoes?
some of Hawaii is made of volcanoes. but not all of it
Why are opals amorphous?
Opals are amorphous because they have no definitve shape. As an example, quartz has a specific crystal shape. Opals can be any shape.
What are the significance of volcanoes in the earth's surface?
it is a meteorite made by a volcanoes
Why is Hawaii known for volcanoes?
Hawaii was made by volcanoes and has a lat of them
A Description Of The Materials Used In Gold Opal Earrings?
Shoppers searching for gold opal earrings can choose from a variety of opals set in different types of gold. They will also be able to select different earring styles. Gold opal earrings can be purchased at retail stores or online.Precious opal, common opal and fire opal are three types of genuine opal. Precious opals are white or black. Iridescent flashes of purple, red, orange, yellow, green and blue can be seen in these opals. Opals with more intense colors are more valuable. Many of these opals are mined in Australia.Common opals do not have flashes of color. They are usually white, red, orange or yellow. The red, orange and yellow opals are sometimes called fire opals. Common opals may also be purple, blue or pink.Synthetic opals are made by humans. They are made from silicon dioxide. Genuine opals are formed from silicon dioxide. Imitation opals are not made from silicon dioxide. They are frequently made from plastic.Opals can be set in earrings made from white gold, rose gold or yellow gold. White gold is made from gold mixed with nickel. Its color is close to platinum. Gold is mixed with copper to create rose gold. This gold has a red tone. Copper and silver is mixed with gold to create yellow gold.Shoppers can select opal earrings in a variety of styles. Women who prefer small earrings will like stud earrings with opals and gold posts. Those who like dangling earrings may prefer fringe earrings with opals hanging in several strands. Some earrings have opals surrounded with diamonds. The opals used in earrings may be round, oval or shaped like teardrops.Gold opal earrings can be purchased at jewelry stores, department stores and some discount stores. Cartier, Saks Fifth Avenue, Sears and Target are some of the stores where gold opal earrings can be purchased. Many jewelry stores in malls also sell opal earrings. They can be purchased from online jewelry stores.Gold opal earrings are available in a wide range of prices. Earrings from Cartier with opals and other stones will cost thousands of dollars. A pair of opal earrings from Sears will cost under $100.
What are food uses of opals?
Opals cannot be used as foods. They are hard, precious stones.
When where opals first discovered in Australia?
The first known discovery of opals in Australia was made near Angaston in South Australia, in 1849, by a German geologist named Johannes Menge. It is presumed that they were used for jewellery some time after that.
