A large Grecco-Roman Onyx intaglio set in a gold bezel. Ca. 3rd-4th Century A.D. A large Grecco-Roman Onyx intaglio set in a gold bezel (27.78mm x 24.16mm). Ca. 3rd-4th Century A.D. Inscribed LOHTHOI NIK, the meaning of which is unclear, but most likely refers to Nike or Niceia the city in BithyniaValue Range: $1,200-$2,000.