Idayimani yeGouldian yenye yezona zinto zixabisekileyo nezinqwenelekayo zamatye anqabileyo emhlabeni. Yidayimani emhlophe enobunzima obumalunga ne-40,23 carats. Yafunyanwa ngonyaka ka-1851 ngumhloli wamazwe oliNgesi uJoseph Gould, owayifumana kumgodi waseKimberley, eMzantsi Afrika. Ukususela ngoko, ibigqalwa njengelitye elinqabileyo elikhethekileyo nelixabiseke kakhulu.
Ixabiso ledayimani yeGouldian lixhomekeke ikakhulu kubukhulu bayo kunye nomgangatho. Nangona kungekho xabiso limiselweyo lale gem, kuqikelelwa ukuba ixabiso layo linokufikelela kuma-20 ezigidi zeerandi nangaphezulu. Uqikelelo lwakutsha nje lubonise ukuba ixabiso ngekharati nganye linokuba phezulu ukuya kutsho kwi-$500 okanye nangaphezulu kumzekelo omhle kakhulu nogcinwe kakuhle.
Nangona idayimani inqabile kakhulu kwaye ixabisekile, ixabiso layo alisoloko libonisa ixabiso layo lokwenyani njengoko izinto ezininzi zinefuthe kwixabiso lokugqibela elithengisiweyo: imfuno yangoku, ukunqaba kwento ekuthethwa ngayo, kunye neemeko zemarike ngokubanzi ziyimizekelo nje embalwa. Ngenxa yezi zizathu, kubalulekile ukuba neengcebiso zeengcali ngaphambi kokuthenga olu hlobo lwezacholo ezibiza kakhulu ukuphepha naluphi na uhlobo lwenkohliso okanye ukukhwabanisa kwemali.