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Garnet
Garnet
is the birthstone for the month of January & anniversary
gemstone for the second year of marriage.
Garnet derived its name from the Latin word ‘granatus’, meaning
like a grain, which refers to the mode of occurrence wherein
crystals resemble grains or seeds embedded in the matrix. Garnet
is a family of minerals having similar physical and crystalline
properties.
There are a number of trade and variety names for garnet, most
of these names are for particular colors of a specie.
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Hessonite is the variety name for a fine
orange, cinnamon brown, or pinkish variety of grossularite, while
tsavorite is the trade name for fine dark green grossularite.
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Melanite is a black titanium bearing variety
of andradite and demantoid is a rich green variety.
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Malaya is a trade name for a
pyrope-spessartite that varies in color from red, through shades of orange
and brownish orange to peach and pink.
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Rhodolite is a purplish red pyrope-almandite
solid solution garnet.
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Fine-quality pyrope garnets from
Czechoslovakia are often called Bohemian garnets.
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Almandite and almandite-pyrope solid solution
garnets are the best abrasive types, but andradite, grossularite, and
pyrope also are used.
All species of garnet have been used as
gemstones.
Garnet displays the greatest variety of color of any mineral, occurring in
every color except blue. For example, grossularite can be colorless, white,
gray, yellow, yellowish green, various shades of green, brown, pink,
reddish, or black. Andradite garnet can be yellow-green, green, greenish
brown, orangy yellow, brown, grayish black or black.
Pyrope is commonly purplish red, purplish red, orangy red, crimson, or dark
red; and almandite is deep red, brownish red, brownish black or violet-red.
Spessartite garnet can be red, reddish orange, orange, yellow-brown, reddish
brown, or blackish brown.
A few garnets exhibit a color-change phenomenon. They are one color when
viewed in natural light and another color when viewed in incandescent light.
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