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General
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Garnet is a group of minerals that have been used since the
Bronze Age as gemstones and abrasives. Garnets are most often
seen in red, but are available in a wide variety of colors
spanning the entire spectrum. The name "garnet" comes from the
Latin granatus ("grain"), possibly a reference to the Punica
granatum ("pomegranate"), a plant with red seeds similar in
shape, size, and color to some garnet crystals.
- The garnet
varieties are Almandine, Pyrope, Spessartine, Andradite,
Grossular and Uvarovite.
Market
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markets for Barton's garnet is quite distinct from those of
commercial garnet in general, and relate largely to high-end
abrasive markets such as coated abrasives, micro-abrasives in
electronic applications, pioneer market development in water-jet
Cutting, and small scale cleaning and de-burring.
- The garnet
industry is becoming increasing more efficient, better managed,
more sophisticated, well funded,
and highly structured. The internal functions of the industry
are still known largely by only those on the
inside.
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Garnet for industrial use was mined in 2006 by four firms, one
in Idaho, one in Montana, and two in New York. The estimated
value of crude garnet production was about $3.38 million, while
refined material sold or used had an estimated value of $6.20
million. Major end uses for garnet were abrasive blasting media,
35%; waterjet cutting, 30%; water filtration, 15%; abrasive
powders, 10%; and other end uses, 10%.
Application
- Garnet is
ground to a variety of sizes to be used as an abrasive. Garnet
sandpaper was the original application of this mineral. It is
also used to make a number of similar products, including
sanding belts, discs, and strips. Today, the vast majority of
garnet is used as an abrasive blasting material, for water
filtration, in a process called water jet cutting, and to make
abrasive powders.
- Garnet is
a semi-precious stone and their natural properties make it an
efficient abrasive for blast cleaning applications. The
combination of the high density and physical properties make it
perhaps nature’s best abrasive for dry or wet blasting
applications.
- Garnet is
used in water filtration, electronic components, ceramics,
glass, jewelry, and abrasives used in wood furniture and
transport manufacturing.
- Garnets
are also useful in defining metamorphic facies of rocks. For
instance, eclogite can be defined as a rock of basalt
composition, but mainly consisting of garnet and omphacite.
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Technology, Products, Market, Production, Grades and Standards,
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