#ochre__ocher  any of various earths containing silica and alumina and ferric oxide; used as a pigment
  supertype:  #earth_color  a colored mineral used as a pigment
  subtype:  #sinopis__sinopi__sinopia__sinoper  a red ocher formerly used as a pigment
  subtype:  #yellow_ocher__yellow_ochre  pigment consisting of a limonite mixed with clay and silica

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