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GEMSTONES

GEMSTONES. Katie Douglass, Katie Michelau, Erin Roy . Zircon. Zircon. Colors: yellow, brown, reddish-brown, orange, light blue, light green, light purple, and pink Hardness on Moh’s scale: 7 ½ Known for luster and fire Color diversity traced by certain elements. Locations.

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GEMSTONES

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  1. GEMSTONES Katie Douglass, Katie Michelau, Erin Roy

  2. Zircon

  3. Zircon Colors: yellow, brown, reddish-brown, orange, light blue, light green, light purple, and pink Hardness on Moh’s scale: 7½ Known for luster and fire Color diversity traced by certain elements

  4. Locations Zircon is found in many places. Here are a few places: Australia, France, Nigeria, and USA Gem quality materials are found: Vietnam, Thailand and Cambodia

  5. SAPPHIRE

  6. Sapphire Colors: Blue, yellow, green, white, colorless, pink, orange and purple Hardness on Moh’s scale: 9 Desirable because of color, hardness, durability, and luster Most popular of gemstones

  7. Locations A large number of sapphires are found in Montana. • Missouri River • Rock Creek • Dry Cottonwood Creek Montana alone has produced over 190 carats in these three locations *Sapphires are found in other places around the world. Madagascar is another particular location.

  8. OPAL

  9. Opal • Colors: colorless, white, orange, yellow, red, purple, blue, green, gray, black, brown (all base colors); many colors can usually be seen at once • Hardness: 5.5 – 6.5 • Known for being the most colorful of all gems • Can form fossils • Mineraloid gel that is deposited at relatively low temperatures

  10. Locations • Forms in rocks • Most common in: • Ironstone • Sandstone • Basalt • Largest fractions are found in: • Australia • Mexico • United States • Also found in England and Czech Republic

  11. RUBY

  12. Ruby • Color: bright red, brownish-red, purplish-red, dark red • Hardness: 9 • Known for its fiery red color • Desirable for its hardness, durability, luster, and rarity • Transparent large sized rubies are more rare than diamonds

  13. Locations • Comes from: • Africa • Asia • Australia • Mostly found in: • Sri Lanka • Thailand • India • Burma • Also found in the U.S. in Montana, Arizona, North Carolina, and South Carolina

  14. Beryl • Beryl is a mineral of gemstones • Pure beryl is colorless, but impurities cause the gemstone to be found in a wide range of colors • Green beryl is called Emerald • Light blue to blue-green beryl is called Aquamarine

  15. Beryl gemstones’ geographical location • Emeralds come from Muzo and Chivor, Colombia. Other locations include Minas Gerais, Brazil; the Ural Mountains of Russia; the Cobra and Somerset Mines in Transvaal, South Africa; and the Habatchal in Austria. • In the U.S., the only place to find emerald deposits is in North Carolina. • Aquamarinecomes from many places in Brazil, in the states of Minas Gerais, Bahia, and Esperito Santo. • Other locations include central Madagascar, Mungo, Baltistan, Pakistan and in Russia. • In the U.S., Aquamarine is found in the New England states, Colorado, California, New Mexico, South Dakota and Utah.

  16. Beryl’s uses • Beryl is the main source of Beryllium which is a tough metal used in alloys for added strength. • Beryl is also used to form many gems. • Emerald is one of the most valuable gems. • Aquamarineis a semi-precious gem and is the most popular light blue gem.

  17. Diamond • Diamond is the most prized of gems, and is also the hardest substance on Earth. • Diamond is the greatest conductor of heat. • Color is graded a letter D through Z from an alphabetical scale:

  18. Diamond’s geographical location • Diamonds are not found in many places. • They are found in South Africa; Namibia, Russia; Australia and Brazil. • In the U.S., diamond is found in Pike County, Arkansas and in California’s Sierra Nevada Mountains. • Some diamonds have also been found in Lac de Gras in the Northwest Territories, Canada.

  19. Diamond’s uses • Diamond is popular in jewelry. • It is the most expensive gem because of it’s brilliance, hardness and rarity. • But 80% of mined diamonds are used as abrasives, thermal insulators, in optics and in electronics. http://www.minerals.net/

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