Quartz | GRHardnessTester.comQuartz is the most abundant mineral on Earth’s surface and also one of the most useful. ¬†Here area few facts about the mineral quarts:

  1. It is made up of one part silicon and two parts oxygen.
  2. Forms at all temperatures
  3. Highly resistant to weathering
  4. Has a hardness value of 7 on Mohs Hardness scale making it a durable mineral
  5. Can be used for glass making, abrasive, foundry sand, & gemstones
  6. Occurs in every color

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