▁the ▁Smith son ian ▁Institution . ▁Since ▁then , ▁it ▁has ▁been ▁on ▁display ▁in ▁the ▁Jan et ▁An nen berg ▁Hook er ▁Hall ▁of ▁Ge ology , ▁G ems ▁and ▁Min er als ▁of ▁the ▁National ▁Museum ▁of ▁Natural ▁History ▁in ▁the ▁Smith son ian ▁Institution ▁in ▁Washington ▁D . C . ▁ ▁Design ▁ ▁The ▁upper ▁half ▁of ▁the ▁neck lace ▁consists ▁of ▁many ▁small ▁diam onds ▁thread ed ▁onto ▁a ▁silver ▁chain . ▁The ▁lower ▁half ▁of ▁the ▁neck lace ▁is ▁divided ▁into ▁two ▁concent ric ▁semi - circ ular ▁str ands , ▁each ▁carrying ▁eight ▁pairs ▁of ▁" football - sh aped " ▁diam onds ▁and ▁four ▁pairs ▁of ▁bar rel - cut ▁emer ald s , ▁arranged ▁symmet r ically . ▁The ▁centre ▁of ▁the ▁lower ▁str and ▁holds ▁a ▁large ▁emer ald ▁supporting ▁a ▁pendant ▁which ▁itself ▁holds ▁five ▁smaller ▁emer ald s . ▁The ▁point ▁where ▁the ▁upper ▁and ▁lower ▁hal ves ▁of ▁the ▁neck lace ▁join ▁is ▁marked ▁by ▁two ▁large ▁emer ald s ▁thread ed ▁onto ▁the ▁chain . ▁Alt ogether , ▁there ▁are ▁ 1 5 ▁emer ald s ▁and ▁ 3 7 4 ▁diam onds ▁in ▁the ▁neck lace . ▁The ▁diam onds ▁of ▁the ▁Spanish ▁In quisition ▁Ne ck lace ▁are ▁the ▁oldest ▁examples ▁of ▁cut ▁diam onds ▁in ▁the ▁Smith son ian ▁Institution ' s ▁National ▁Gem ▁Collection . ▁ ▁References ▁▁ ▁Category : J ew ell ery ▁in ▁the ▁collection ▁of ▁the ▁Smith son ian ▁Institution ▁Category : Ind