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No. The term geode is used to refer to a cavity or vug in sedimentary or igneous rock that is lined or completely filled in with mineral deposits or crystals. These deposits are formed from the mineral rich water that enters the cavity. It is more mineral crystal than rock.
Wiki User
∙ 16y ago
Wiki User
∙ 12y agoThey aren't found in igneous matrix only. 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 form silica gel which hardened to the agate we know.
Generally, the formation temperatures are now thought to have been between 40 and 270degrees centigrade, perhaps more to the lower end of this range. Theory of agate formation has evolved with better microscopes and continued study over the years. Books by Roger K. Pabian are recommended.
At any rate, there were no human witnesses to the formation of agates, and we are still learning about these fascinating gems.
Wiki User
∙ 14y agoyes it is a common and widely occurring type of intrusive, felsic, igneous rock
Wiki User
∙ 14y agoAgate is a mineral.
Wiki User
∙ 11y agoyes
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Are igneous rocks made up of igneous rocks?
Sedimentary rock can be made up partially of igneous clasts, but igneous rock is igneous rock.
Is tuff igneous sedimentary or metamorphic?
igneous (extrusive)
What are rocks that form when lava hardens?
Igneous, examples include Granite and Basalt
What is the cleavage of onyx?
Onyx like agates is a crypto-crystalline mineral and so it doesn't have any cleavages developed.
When magma is cooled it becomes what?
Cooling and solidifying magma turns into igneous rock.
Are agates metamorphic igneous or sedimentary?
Agates are none of the above rock types, but a form of the mineral quartz, normally formed as a gas vesicle filler in igneous rocks, the microcrystalline quartz gradually filling the cavity with successive layers.
Are Landscape agates or moss agates are precious?
semi precious
Do agates react different in water?
This site will explain:* http://cash-and-treasures-wiki.travelchannel.com/page/Origin+of+Agates?t=anon
Where can you find agates?
Agates can be found in various places around the world, including river beds, volcanic rocks, and areas with geothermal activity. Some popular locations for finding agates include the beaches of Lake Superior in the United States, the coasts of Brazil and Uruguay, and the state of Gujarat in India. Additionally, agates can also be found in certain regions of Australia, Mexico, and Germany, among others.
Where can agates be found?
Botswana.Because theres an agate called botswana agate and also they can be from Wyoing, madagascar,under the sea. ANSWER: There are many beautiful agates to be found in Lake Superior. They are easy to find too. Just wade in and pick up the objects that reflect the sun and look very bright and shiny. These will be agates.
What are the different kinds of agates?
Moss Agate and Turritella Agate
Where do agates form?
somewhere... near a volcano or dormant volcano
Where can you sell raw unpolished agates?
eBay is one place.
How much money per pound is agates worth?
600$
Where are Tennessee Agates found?
Tennessee Agates are primarily found in the areas surrounding the Cumberland Plateau in Tennessee, United States. Some specific locations include the counties of Smith, Warren, and White.
Who buys agates?
People with money they seem this is a pretty stone
Where is the very best place to find agates in Duluth MN?
Beaches and gravel pits are popular spots to look. Try to find a local gem and mineral club to learn more, or find the book on Lake Superior agates.
