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quartz

 
pronunciation:
kwawrts
features:
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part of speech: noun
definition: Quartz is a hard mineral that can have beautiful crystals and comes in different colors. It is an important mineral because it is found in many rocks on the earth. Sand is often made out of very small grains of quartz.
My grandfather collects minerals, and he gave me this amazing piece of quartz as a gift. It's so clear that you can see right through it.
 
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  rock, stone