Garnet

Chemical Formula: X2+3Y3+2Si3O12

Chemical and Physical

Usually are red in color but can be orange, green, yellow, purple, black or brown. On Moh's scale, it rates a 6.5 to 7.5. They can range in size from individual crystals to massive occurrences. They have a vitreous luster and a lack of cleavage. The elements listed in it's formula are O and Si.

Other Facts:

Morefield Gem Mine, in Virginia is one of the biggest mines that harnesses this gem.

Open pit mining- one method used to extract this gem which requires the workers to dig up the soil from the area and then chip the rock out using machinery. This method is very damaging to the environment, mainly the soil.

Once removed, workers wash, screen, and sort the gems by quality. This process is done usually by machines or conveyors built specifically for this job.

In marketing, usually the more brokers or distributors who have handled the gem, the higher the price. A garnet of 1 carat will run in the range of 90-130 USD depending on it's color among other factors.

Past and Present Uses and other facts!

Past- Industrial Material and as a gemstone (accessory).

Present- Abrasive Blasting and Waterjet Cutting

When accessing this gem, the mining method (mentioned above) destroys the soil.
A different method that employs the use of water which is a less damaging method is now being used more often.

Citations

"Garnet." : A Mineral, a Gem, an Abrasive, a Filter and More! Geoscience News and Information, 1 Jan. 2012. Web. 10 Nov. 2014.

Wood, J. Lang. "How Is Garnet Mined & Processed?" EHow. Demand Media, 4 May 2010. Web. 10 Nov. 2014.

Olson, Donald W. "Gemstones - Garnet." Gemstones - Garnet. USGS, 11 Jan. 2013. Web. 10 Nov. 2014.


Alexus Foster
4th block

11-9-14