Sphalerite

 Mohs scale
  3.5 - 4.0
 Specific Gravity
  3.95 - 4.10
 Refractive Index
  2.368 - 2.371
 Crystal system
  Cubic
 Chemical Composition
  (Zn,Fe)S
 
 
 Sign of Zodiac
  Gemini, Virgo
 Chakra
  Root Chakra, Sacral Chakra, Solar Plexus
 
 
 


 
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