Posted by
The Brains on Jun 13th, 2010 in
State Mineral |
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ContentsSillimanite – Al2SiO5Sillimanite – Al2SiO5
In 1977, the Delaware General Assembly, acting on a proposal by the Delaware Mineralogical Society, established sillimanite as the Delaware State Mineral. This act recognizes the geological and mineralogical significance of the large masses of this mineral found as boulders at Brandywine Springs, an occurrence that was recognized as important in the...
Posted by
The Brains on Jun 10th, 2010 in
State Mineral |
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ContentsPure fluorite (CaF2) is made of the elements calcium (Ca) and fluorine (F)The many uses for fluoritePure fluorite (CaF2) is made of the elements calcium (Ca) and fluorine (F)
A bill designating fluorite the official state mineral of Illinois was passed in 1965
Fluorite melts at low temperatures and flows through other minerals, such as limestone, which is where it gets its name. Fluere in Latin, means to...
Posted by
The Brains on Apr 15th, 2010 in
State Mineral |
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The accidental discovery of gold in 1848 at Sutter’s
Mill in Coloma started a bonanza that brought California fame and gave it the title of the “Golden State.” The Gold Rush of 1849 and the subsequent influx of settlers led to California becoming the 31st state in 1850.
NATURAL OCCURRENCES
The concentration of gold ore, and the market value of gold determine whether a deposit is a mineable orebody. The...