Danburite

 Mohs scale
  7.0
 Specific Gravity
  2.97 - 3.03
 Refractive Index
  1.627 - 1.639
 Crystal system
  Orthorhombic
 Chemical Composition
  CaB2Si2O8
 Sign of Zodiac (Click on the constellation for more information)
  Leo
 Chakra (Click on the chakra for more information)
  Heart Chakra
 Birthstones (Click on the month for more information)
  None
 
0