GIA、HRD、IGI、NGTC 4种钻石证书区别

       zuanshizhengshushilejiezuanshizhenjiajidengjidezhongyaoshumianwenjian，duiyuxiaofeizhegoumaizuanshiyoufeichangzhongyaodeyiyi。danhenduoxiaofeizhefaxian，zuanshijiandingjigoubuzhiyisuo，yincizuanshizhengshuyebuzhiyouyizhong，biruchangjiandegia、hrd、igi、ngtczhengshu，neimezhei4zhongzuanshizhengshudequbieshishenmeni？xiamianlaigongtonglejie。

       guojishangbijiaoyouquanweidezuanshizhengshushigia，danbingbushisuoyoudiqu、pinpaidoutigonggiazuanshizhengshu，qitahaibijiaochangjiandeyouhrd、igi、ngtczheixie。zuanshizhengshubutongjiuyiweizhezheixiezuanshijiandingjigoushibuyiyangde，neimezaijiancejishuhuozhecezhongdianfangmiankenenghuiyousuobutong，jiexialaijiugongtonglejieyixiabutongzuanshijiandingzhengshuzhijiandetedianqubie。

       NGTC证书

       quancheng：nationalgems&jewelry technology administrative centre

       zhongwenming：guojiazhubaoyushizhiliangjiandujiancezhongxin

       qishinianfen：1993nian

       zhengshudiwei：woguodiyigezuanshifenjibiaozhundechuanglizhe

       tedian：chuleduiluozuanjinxingfenjijiandingwaihaiduixiangqianhaodezuanshitigongjianding。

       tishi：zhongguokeshishijieshangweiyiyouzuanshifenjiguojiabiaozhunhebiseshiguojiabiaozhunyangpindeguojia！ngtcdezuanshizhengshumuqianjiucaiqu2010nianzuixinxiudingdeguojiabiaozhun。zuanshifenjiguojiabiaozhundeqiegongfenjicaiquzhiguandewenzi，shidezhongguoxiaofeizhezaikanzhengshushigengjiamingbai。

       zongjie：chulechujuzuanshifenjizhengshuwai，haiduiyijingxiangqianhaodezuanshijinxingfenji。erqieweitigonggenghaodijiandingfenjifuwu，ngtcbuduanyinjinxinshebei，buduanshengjizhengshubanben。budanzengjiadaxiaoliangzhongbanbenzuanshizhengshuyigongxuqiu，chucizhiwaihaizengjiaduozhongfangweichaxunfangshi。

       HRD证书

       quancheng：hoge raad voor diamont

       zhongwenming：bilishizuanshigaojiecengyihui

       qishinianfen：1973nian

       zhengshudiwei：chengliyuzuanshiqiegezhongxinbilishianteweipu，yuguojizuanshiweiyuanhuigongtongqicaole“guojizuanshifenjibiaozhun”idcbiaozhun。

       tedian：hrdduiyucaisezuanshiyansedengjihetianranxingdejiandingyouweituchu。

     ;  tishi：hrdzuanshizhengshuhaituichulezhendui1kelayixiazuanshidekuaijie“zuanshijiandingzhengshu”，neirongyimuleran，danxinxidianshaoyoujianlve。

       zongjie：hrdzuanshizhengshushiyongjiaoduomiaoshuxingyuyan，buxiangqitazhengshuneiyangduizuanshiyansecaiyongd、e、fdenghuafen，ershiyongru“white”“slightly tinted white”dengduanyu，erqienyixiasejijiubuzaiqufen。

       GIA证书

       quancheng：gemological lnstitute of america

       zhongwenming：meiguozhubaoxueyuan

       qishinianfen：1931nian

       zhengshudiwei：chuangzaoleyanyongzhijindezuanshi4cfenjixitong，bazuanshijiandingtuixiangguojihuadechuangshizhe。

       tedian：zuoweibiaozhundezhidingzhe，giaduiyu4cfenjibiaozhundebakongjueduizuiweijingzhun。

       tishi：daiyougiazhengshudezuanshiyaobidaiyouqitazhengshudezuanshijiagegao，bujinyinweigiazhengshudejiandingfeiyonggenggaoyixie，congliutongxingdaogongxinli，renmendoupubiangengxiangxinzheigebiaozhunzhidingjigoudejiandingjieguo。

    ;   zongjie：shuodaozuanshizhengshuhenduorenxiangdaodejiushigia，zaishichangshanggiazuanshizhengshudeshiyongyejihukeyichengdeshangzhuliu，shenzhikeyichengweizuiquanweikeguandezuanshizhengshu。yexushuzidejianyanjieguomeigejigoudoukeyizuodao，dankeyizuodaochuanglijianyanzhidudezhiyougia。

       IGI证书

       quancheng：the institute of　gemology

       zhongwenming：guojibaoshixueyuan

       qishinianfen：1975nian

       zhengshudiwei：shijieshangzuidadedulizhubaoshoushijiandingshiyanshi，zaiquanqiugedazuanshijiaoyizhongxinsheyoushiyanshi，beichengwei“xiaofeizheshenbiandequanweijiandingsuo”。

       tedian：igikeweirenhechicundaxiaodezuanshichujuzhengshuduozhongbanmianhegeshi，fangbiansuishenxiedai。xiaozhengshumaquesuixiaowuzangjuquan，wulunbanmianruhe，meifenzhengshudougenjuyangedeguojibiaozhunkaiju，bingqieyongyouduozhongfangweicuoshi。

       tishi：igizhengshuduiyuqiegongxinxidemiaoshujiweijingzhun，zaifinishxiangxiahaixifenlesymmetry（duichengxing）、polish（paoguang）、proportion（bili）dengsangebufendebilimiaoshu，duizuanshidijian、yaobudengxijiemiaoshuyehendaowei。

       zongjie：igidelishijiqifengfu！tazuichushicongbilishizuanshishijiasirenshouzangkaishide，houlaibeiouzhougegewangshiguanzhu，duiyuyijingxiangqianqiejiaoweifuzadewangguan、xianglian、jiezhidounengjichuxiangxizhunquedijiandingjieguo，suoyibeiyuelaiyueduoderenxinren。erqieigizhidingleshijiediyizhangwanzhengquanmiandezuanshiqiegongpingjibiao（cut grade chart），zheizaihoulaichengweilexiandaizuanshiqiegongtixipingdingbiaozhundechuxing。

       yishangjiushigia、hrd、igi、ngtcsizhongzuanshizhengshudefenbiejieshao，qishirenheyizhongquanweizuanshizhengshudoushiwomengoumaizuanshidezhongyaocankao，dajiazaigoumaideshihouyebubiduizuanshizhengshudezhongleitaiguotiaoti。zaigoumaizuanshishijianyidajia，yidingyaoyouquanweizuanshizhengshu，duiyu30fenyishangdezuanshijinliangsuoyaogiazhengshu，qitazhengshuyekecankao。