Agate /ˈæɡət/ is a cryptocrystalline variety of silica, chiefly chalcedony,
characterised by its fineness of grain and brightness of color. Although agates
may be found in variou...
There are thousands of named agates found in nearly all countries of the world.
... Rift zones are cracks in the Earth's surface out of which molten lava flowed.
May 30, 2013 ... Agate belongs to the quartz (silicon dioxide) family of minerals. Quartz is the
second most abundant mineral found on earth's continental crust, ...
Agate is a banded form of finely-grained, microcrystalline Quartz. ... Agates and
Jasper were historically found in the Idar-Oberstein region, and cut and polished
Items 1 - 12 of 216 ... Called the earth rainbow, the concentric bands of Agate form in nearly ... Laguna
Agate is found in an area covering roughly four square miles ...
Sep 1, 2001 ... He glances toward the array of cut and polished agates lining the ... "The hot
water pumped from deep within the earth contains a lot of dissolved silica," he
explains. ... The best are found in basalt, a young volcanic rock.
For instance, the bands on many Agate stones wrap around the stone like a tree's
rings in ... Agate is found all around the world including the United States.
Formation from water near the Earth's surface ... minerals: amethyst (quartz);
agate ; and the formation of opal.
EARTH ... About 20 of these 70 gems are commonly found. ... The Fairburn agate
was designated as South Dakota's state gemstone on February 11, 1966.
The book features an easy-to-use identification guide and a worldwide listing of
where agates are found. More than 200 color photographs of superb agate ...