harare belgian-based businessman friday challenge zimbabwean first lady grace mugabe accusation dupe 1.35 million diamond ring ask provide court evidence back lawsuit president robert mugabe wife grace week sue jamal ham harare high court accuse fail deliver 100 carat jewel say order wed anniversary last year grace 52 see possible successor 93-year-old husband say ham instead provide inferior ring worth 30,000 complain refund 120,000 ham file court application dispute claim demand grace supply court detail copy sale agreement proof payment put defense ham lawyer beatrice mtetwa say depose court paper behalf client friday court paper see reuters ham british national say grace also provide proof fact own zimbabwean company first lady wish sell recover money exactly allege payment do full date require full detail account holder account number copy account statement require ham say court application grace lawyer wilson manase answer phone contact comment court case lift veil wealthy lifestyle mugabe wife nickname gucci grace repute dedication shop time zimbabwe grip severe u.s. dollar crunch cash shortages belgian-based businessman challenge grace mugabe 's diamond ring claim