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10 Interesting Facts About Rocks

i will be showing 10 facts and a picture with each fact
by

Jessica Jacobson

on 21 September 2012

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Transcript of 10 Interesting Facts About Rocks

10 interesting facts about rocks Diamonds are the hardest natural substance found on earth Rubies are the most popular gemstone today Geodes are dull balls of igneous or sedimentary rock on the outside, but contains beautiful crystals on the inside Gold is so soft and easily worked that you cloud roll on ounce of it into a hair-thin wire 50 miles long Quartz is one of the most common mineral on earth Turquoise is the first recorded use dates back to 5000 BC in Mesopotamia where people used the gemstone to make beads Jade because of it's toughness has been used for many cultural things like hammers, fish hooks,and stone axes
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