#beryl  the chief source of beryllium; colored transparent varieties are valued as gems
  supertype:  #mineral  solid homogeneous inorganic substances occurring in nature having a definite chemical composition
  substance:  #beryllium
  subtype:  #aquamarine  a transparent variety of beryl that is blue green in color
  subtype:  #emerald.beryl  a green transparent form of beryl; highly valued as a gemstone
  subtype:  #morganite  a kind of pink beryl used as a gemstone

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