ons ". ▁As ▁reported ▁by ▁Inside ▁Star ▁Tre k ▁editor ▁Ruth ▁B erman ▁, ▁" ard ent ▁rock ▁h ound ▁and ▁amateur ▁la pid ary " ▁Rod den berry ▁came ▁up ▁with ▁the ▁V ul can ▁philosophy ▁after ▁he ▁presented ▁Leonard ▁N imo y ▁with ▁a ▁unique ▁" hand - craft ed ▁piece ▁of ▁j ew el ry ", ▁a ▁" p endent " ▁( s ic ) ▁of ▁pol ished ▁yellow ▁gold ▁( circle ) ▁and ▁flor ent ined ▁white ▁gold ▁( triangle ), ▁with ▁a ▁stone ▁of ▁brilliant ▁white ▁fab ul ite ▁— ▁an ▁artificial ▁gem ▁" develop ed ▁by ▁the ▁las er ▁industry ▁and ▁used ▁in ▁space ▁mechan isms ▁for ▁its ▁optical ▁qual ities ", ▁and ▁thus ▁well - su ited ▁as ▁a ▁gift ▁for ▁an ▁actor ▁in ▁a ▁science ▁fiction ▁show . ▁Read ers ▁were ▁encourag ed ▁to ▁submit ▁their ▁interest ▁in ▁such ▁a ▁product ▁to ▁Lincoln ▁Enter pr ises ▁mail ▁order ▁firm . ▁It ▁was ▁noted ▁that ▁" less ▁expensive ▁materials " ▁would ▁keep ▁costs ▁down . ▁ ▁According ▁to ▁William ▁Sh at ner ▁in ▁Star ▁Tre k ▁Mem ories , ▁ID IC ▁was ▁only ▁worked ▁into ▁the ▁episode ▁" Is ▁There ▁in ▁Tr uth ▁No ▁Beaut y ?" ▁as ▁an ▁after th ought . ▁The ▁actors ▁all ▁knew ▁it ▁was ▁a ▁mere ▁advert ising ▁to y . ▁Report edly , ▁Leonard ▁N imo y ▁was ▁asked ▁to ▁wear ▁it ▁and ▁refused , ▁so ▁it ▁was ▁passed ▁on ▁to ▁Sh at ner ; ▁when ▁he ▁also ▁refused ,