Garnet Facts:

Occurs in all these colors!
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(Pretty much most colors!)

Random Facts:

Colors- Red, brown, yellow, orange, pink, white, and colorless.
Chemical Formula- X2
Where it is found-Garnet is found in Africa, Brazil, Canada, India, Madagascar, Sri Lanka, and the USA.
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'The Fancy Pomegranate
'The Fancy Pomegranate


Name
People have been using the name Garnet since ancient times. It was derived from the Latin term granatium which means a pomegranate. It was named this because people thought that the small, red garnet crystals looked like pomegranate seeds. The name was first suggested to mineralogists by German theologian and philosopher, Albertus Magnus.



History
During the Middle Ages, people believed that garnet would stop bleeding. Many early cultures thought that garnets would help prevent and cure blood disorders and infections. It is also said that Noah used garnet on the bow of his ark to help navigate. Also, garnets were carried by those who traveleed, because they believed it would keep them safe from accidents. Legend has it that garnets even protect their owners from nightmares. Garnets were even used as bullets, because the shooters thought the red color would increase the intensity of the wound, which is ironic, since those in the Middle ages thought it would make it stop bleeding.


The wonderful uses of garnet!
The wonderful uses of garnet!


Uses
Garnet sandpaper was the first use of the mineral. It is also used to make a lot of similar things like sand belts, disks, and strips. Today, it is mainly used as an abrasive blasting material, for water filtration, in a process which is called water jet cutting, and to
make abrasive powders. As a solid Garnet is used for rings, earrings, bracelets, and pendants. The reason it is used for so much is because of its cutting ability to make any shape and size.

Garnet Group Name


ISOMETRIC is the mineral group. This mineral group is a.k.a. cubic. It is a crystal system. It has 3 orthogonal axes that are the same length.

miner_dude.gif Where or How To Find It


The crystal forms (or types of garnet) and hardness are features that make it stand out. Refer to HARDNESS and FORMS OF GARNET below. It also becomes magnetic when heated. Garnet usually occurs in metamorphic rock and is common all over the world. Garnet is usually mined in open pit mines. In the United States there are mines in the following states: Alaska, Arizona, California, Colorado, Connecticut, Idaho, Montana, Nevada, New Hampshire, New York, North Carolina, Pennsylvania, Utah, and Virginia.

Hardness

6½ - 7½. Sometimes can be as hard as 8 ½ in some forms. (All numbers are according to the Mohs scale).





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Forms of Garnet
Most garnet crystals form as small, chunky balls, with many symmetrical sides. The gemstone quality garnets like almandine, and pyrope can be shaped and cut.There are two different forms, or types , of garnet. One of the forms of garnet is in a grainy form, which is when it is used as an abrasive like sandpaper. The other is a crystal form. This form is more common. It is found most commonly in jewelry. In crystal form the shape is in small ball shapes sometimes described as little soccer balls. external image Garnet-Paper.jpg external image garnet-jewelry.jpg

How it forms

Garnet always forms inside of metamorphic rock. The most common way for garnet to form is when the rock undergoes metamorphism, or change. A less common way for garnet to form is by grinding. You must have two metamorphic rocks which have already formed, lying next to each other. As the earth is shifting, the rocks will then grind against each other and form garnet.

How Much is It Worth?



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It is worth $15 to $25 dollars an ounce.

Composition of Garnet

Pyrope- Magnesium aluminum silicate (deep red)
Andradite- Calcium iron silicate (colorless, yellow-green, or brown to black)
Uvarovite- Calcium chromium silicate (emerald-green)
Grossular- Calcium aluminum silicate (white, yellow, yellowish-green, brownish-red, orange, or black)
Spessartine- Manganese aluminum silicate (yellow, rose, or orange to reddish-brown)
Almandine- Iron aluminum silicate (red to violet-red)

Crystal Shapes:

Dodecahedron
Tris-octahedron


external image dodecahe.gif external image pyritohe.gif external image color%20change%20garnet_zcg1006ah.jpg

Chemical Composition

Garnet is composed of the elements calcium, manganese, and iron. Although chromium and titanium can be found also in Garnet. Some garnets contain high amounts of vanadium. Vanadium gives Garnet a color changing affect. Their is also actually a blue colored garnet but is quite rare and was found in the 1990's in Beckley, Madagascar.

Luster

Vitreous to Adamantine. That means that it can have all of the types of lusters.

Streak

Colorless

Cleavage

none

How to Identify Garnet

First of all You can't identify garnet by color as you know you can find garnet in shades of pink, orange, green, yellow, purple, brown, black, and even without color. Blue is Rare but can be found. Shine natural and artificial light at it to see if it changes colors.If it does, you might have found the extremely rare star garnet that produces "streaks" or "rays" that gleam with light. This kind of garnet is mostly found in Idaho and parts of India. Second test its hardness on the Mohs scale garnet is around 6 1/2 - 7 1/2. Lastly, Check the shape of the crystal that it is usually, it is usually rounded.

click url below to watch garnet video
Gem expert Eugene Stewart talks about the Idaho star garnet
SDNHM - Garnet
How to Identify Garnet Rocks | eHow.com http://www.ehow.com/how_4474098_identify-garnet-rocks.html#ixzz19wKdL9Jj
Read more: How to Identify Garnet Rocks | eHow.com http://www.ehow.com/how_4474098_identify-garnet-rocks.html#ixzz19wJxVeNH

Read more: How to Identify Garnet Rocks | eHow.com http://www.ehow.com/how_4474098_identify-garnet-rocks.html#ixzz19wIphePu

Bibliography:


http://minerals.usgs.gov/minerals/pubs/commodity/gemstones/sp14-95/garnet.html
Olson, Donald "Fist Gov." July 17, 2002

http://www.bernardine.com/birthstone/garnet.htm

Powell, Daryll. "Garnet (Industrial)." Common Minerals. Mineral Information Institute, 1999. Web. 1 Dec 2010. http://www.mii.org/Minerals/photogarnet.html.

Friedman, Hershel. "The Mineral and Gemstone Kingdom ." GARNET Group. Hershel Friedman, 2003. Web. 18 Dec 2010. <http://www.minerals.net/mineral/silicate/neso/garnet/garnet.htm>.

"Garnet." Garnet. San Diego Natural History Museum, 2010. Web. 18 Dec 2010. <http://www.sdnhm.org/fieldguide/minerals/garnet.html>.
http://www.ehow.com/how_4474098_identify-garnet-rocks.html

Dictionary :

Theologian- One who studies theology.
Orthogonal-Straight or perpendicular.
Dodecahedron- Twelve sided polyhedron.
Tris-octahedron- 24 sided polyhedron.
Crystal Forms-different forms or types of a mineral.
Abrasive- A smoothing substance such as pumice or every that is used to smooth or polish a surface by grinding or scraping. EX: sandpaper.
Metamorphic rock-Sedimentary or igneous rock which has been changed by a force such as heat or pressure.