Amazonite

 Mohs scale
  6.0 - 6.5
 Specific Gravity
  2.56 - 2.58
 Refractive Index
  1.52 - 1.53
 Crystal system
  Triclinic
 Chemical Composition
  KAlSi3O8
 Sign of Zodiac (Click on the constellation for more information)
  Virgo Aquarius
 Chakra (Click on the chakra for more information)
  Heart Chakra
 Birthstones (Click on the month for more information)
  None