How Are Agates Formed?

Answer

Agates form in hollow cavities as a secondary deposit. Even though they can form in all types of host rocks most of the agates we see were formed in ancient volcanic lava.
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Agates are semiprecious stones in the chalcedony category of minerals, a type of complicated quartz structure made from different fibrous bands of color that can range from white
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Agates are formed in gas cavities in volcanic rock, as well as in cracks and holes in metamorphic and sedimentary rocks. Solutions high in silica content filled these cavities to
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An agate starts with a cavity, a void in the rock. The best are found in basalt, a young
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Agate forms when gas bubbles trapped in solidifying lava become filled with alkali and silica-bearing waters, which coagulate into a gel. The alkali attacks the iron in the surrounding
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Ask.com Answer for: how are agates formed
How Are Agates Formed?
Agates are semiprecious stones in the chalcedony category of minerals, a type of complicated quartz structure made from different fibrous bands of color that can range from white and gray to green, red, and blue, with a variety of translucent and opaque... More »
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Agates are formed when volcanic rock is formed near water. Silica-rich water is pushed up into the rock through bubbles and when the water evaporates it forms a crystalized gel and then hardens.
Explore this Topic
Agates are potato shaped rocks that have coloured patches and are sometimes translucent. They are a variety of chalcedony that are formed from layers of quartz ...
Black onyx is a form of agate that has black and white strips or ribbons flowing through it. It is mined in areas such as Brazil, Canada, the Czech Republic, Germany ...
Silicon can be found within the earth's crust in the forms of oxide and silicates. The oxide appears in sand, quartz, rock crystal, amethyst, agate, flint, jasper ...
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