#crown_jewels  regalia (jewellery and other paraphernalia) worn by a sovereign on state occasions
  supertype:  #regalia  paraphernalia indicative of royalty (or other high office)
  subtype:  #diadem__crown  an ornamental jewelled headdress signifying sovereignty
     subtype:  #coronet.diadem  a small crown; usually indicates a high rank but below that of sovereign

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