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Message: <blockquote data-quote="IveyStyle" data-source="post: 8544318" data-attributes="member: 300727">What are Gems? Some minerals are highly prized because of their exceptional radiance  and color. The main physical properties of gemstones are color, luster,  how light passes through, and hardness. The gem form of corundum is a  ruby, but non-gemstone corundum is used as an abrasive (emery) in  sandpaper. -Ruby in the Rough- Its green surroundings showcase a ruby from Tanzania in  its unpolished beauty. Rubies, valued as precious gems, are the mineral  corundum in its red form. Perhaps the country best known for its rubies  was Myanmar (Burma), but the country's production has greatly decreased.  Today rubies are also created synthetically in the lab                                           . <img src="http://images.nationalgeographic.com/wpf/media-live/photos/000/011/cache/ruby-rough_1177_600x450.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />                                      °°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°° -Yellow Diamond- The igneous rock kimberlite sets off a yellow diamond  from South Africa, a country known for its diamond mines. At 616 carats,  one of the largest diamonds in the world—the Kimberley octahedron—is a  yellow diamond.                                                                          <img src="http://images.nationalgeographic.com/wpf/media-live/photos/000/013/cache/yellow-diamond_1302_600x450.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> °°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°° -Rubies- Rubies shine red against black rocks. Ruby, the common name for the  mineral corundum in its red form, is a precious gemstone. If the mineral  has a blue color it's known as a sapphire. Made up of the elements  aluminum and oxygen, corundum also can be yellow, gray, or brown   <img src="http://images.nationalgeographic.com/wpf/media-live/photos/000/011/cache/rubies_1176_600x450.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> °°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°° -Beryl Emerald-                                           When the mineral beryl takes on a green form, we know it  as an emerald. Highly valued by Mesoamerican cultures, some of the  finest emeralds come from Colombia. Beryl is a beryllium-aluminum  silicate, and its color comes from small amounts of chromium. <img src="http://images.nationalgeographic.com/wpf/media-live/photos/000/008/cache/beryl-emerald_836_600x450.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> °°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°° -Gem Mining-                                           Awash in yellow, a gem miner near Ratnapura, Sri Lanka,  separates stones from clay-laden mud. Local industry relies on the  precious and semiprecious stones found in the mines, some of which are  more than 40 feet (12 meters) deep. <img src="http://images.nationalgeographic.com/wpf/media-live/photos/000/009/cache/gem-mining_971_600x450.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> °°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°° -Topaz-                                           This cut topaz gemstone shows off its striking blue  coloration, but the mineral also occurs in a colorless form or with a  yellow or green color. A red topaz is a rarity. Topaz occurs in the  igneous rock rhyolite. <img src="http://images.nationalgeographic.com/wpf/media-live/photos/000/012/cache/topaz_1252_600x450.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> °°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°° -Star Sapphire-                                           A sapphire, the common name for the mineral corundum in  its transparent blue form, sparkles. As seen here, some sapphires, when  cut to a convex shape, exhibit a striking six-pointed star in direct  sunlight. While sapphires are found in a few locations around the world,  these "star" sapphires often originate in Sri Lanka.<img src="/styles/default/xenforo/smilies/default/cool.gif"  class="smilie" loading="lazy" alt=":cool:" title="Cool    :cool:" data-shortname=":cool:" /> <img src="http://images.nationalgeographic.com/wpf/media-live/photos/000/012/cache/star-sapphire_1229_600x450.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />                               °°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°° -Tourmaline-                                           A polished tourmaline from India gleams. Cut in a convex  form known as a cabochon, this red tourmaline could also be called a  rubellite because of its red coloration. An Egyptian legend explains  that tourmalines come in so many different colors because they passed  through a rainbow on the journey from the Earth's center, but scientists  know that a tourmaline's chemical composition determines its color. <img src="http://images.nationalgeographic.com/wpf/media-live/photos/000/012/cache/tourmaline_1253_600x450.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> °°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°° <img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /><img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /><img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /> <img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" />If You Like The Thread,Leave A Comment Please <img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /> <img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /><img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /><img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /><img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /><img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /><img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /> <img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /><img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /> <img src="/styles/default/xenforo/smilies/default/love.gif"  class="smilie" loading="lazy" alt=":love:" title="Love    :love:" data-shortname=":love:" /> </blockquote>

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