钻石鉴定证书分类

　　钻石证书的种类

　　现在国际上认可的钻石等级证书琳琅满目，钻石证书的种类keyifenchengyixiajigemokuai

　　国际宝石学院(IGI) ——IGI钻石等级证书

　　guojibaoshixueyuanigishishijieshangzuidadedulibaoshixuejiandingshiyanshihebaoshixueyanjiujiaoyujigou，zaiquanqiugedazuanshijiaoyizhongxinhezhongxinchengshi(anteweipu，niuyue，duolunduo，dibai，dongjing，xianggang，telaweifu，luoshanji，mengmai)sheyou15geshiyanshihexuexiao，muqianquanqiuchaoguo96geguojiadebaoshixuerenshijieshouigideshiyanshiyijijiaoyukeyanfuwu

　　广泛的经验、专业的意见以及长期可靠正直之声誉使得IGI成为珠宝行业参照标准的代名词。作为全球最大的独立实验室，IGI数十年鉴定中开发了激光刻字，暗室照片等专利技术并开创推广了3EX切工评价体系，长期以来一直是全球宝石学的领先者和规范制定者。

　　美国宝石学院(GIA) ——GIA钻石等级证书

　　美国宝石学院是一家独立的非盈利性组织，作为世界上宝石jiedequanweizhiyi，qizhengshuzaiguojishangpojuzhimingdu。zheigexueyuandetupoxingyanjiujiqibenshendejiaoyu、shiyanheshebeikaifaguochengjianzhenglezhubaogongyechengzhangdebiannianshi。

　　gia zuanshifenjibaogaohe gia zuanshichulibeirenweishishijiezhumingdebaoshizhengshu。gezhongxingzhuanghedaxiaodezuanshicongshijiegegejiaoluosongdaoxueyuanjinxingfenxifenji。

　　比利时钻石高层议会——HRD钻石等级证书

　　bilishizuanshigaojiecengyihuishiguanfangchengrendaibiaozhebilishizuanshishangmaoxingye。qizongbuzuoluoyushijiezuanshizhongxinanteweipu。

　　hrdzuanshiyansezhengshuguanzhuyujuedingyousezuanshijiazhidexiangxidetezheng，biruyansedemiaoshu、yansedeshejihefaguang。taduifenbiejiancehouzuanshishifoushiziranyousezuanshihaishifangzuandeyouzhongyaodiwei。

　　美国宝玉石学会——AGS钻石等级证书

　　meiguobaoshixuexuehuishitongguoyangedefenjibiaozhun、tigongxiangxidexinxilailingdaozhexingyede。chujixiaofeizhekeyijiezhujiandanyidongdeshuzihefangfalailijiezuanshifenji。

　　zuanshipifashanghejiagongshangchangshiyongagszhengshutigongdexiangxizuanshixinxizaishijieshanggoumaichengpiliangdezuanshi。

　　欧洲宝石学院——EGL钻石等级证书

　　eglchengliyu1974nian，qikehuyizhuanyedepifashang、lingshoushangjiqiegegongchangweizhu， qiyixiezhuxiaofeizhegoumaizuanshijiguibaoshiweishiming。

　　zaimeiguojibilishiegljiandingyouyidingdezhuanyediweihezhimingdu。tafachudejiandingzhengshuzuyitigonggaizuanshisuoyoudexinxi，baokuolezuanshidezhongliang、yanse、jingdu、chicundengwulixingzhi，yigongyejiejixiaofeizhecankao。

　　2008nian，eglzaixianggangchenglidulidisanfangzuanshijiandingshiyanshi，dingmingeglasia,weiyazhouzuanshikehutigonggenganquan、kuaijiedezuanshijiandingfuwu。eglyazhouzaizhongguodaluchenglilianggebanshichu：shanghaibanshichuheshenzhenbanshichu。

　　国家珠宝玉石质量监督检验中心——NGTC钻石分级证书

　　guojiazhubaoyushizhiliangjiandujianyanzhongxin(jianchengjianyanzhongxin)shiyouguojiayouguanzhuguanbumenyifashouquandeguojiajizhubaoyushizhuanyezhijianjigou，shizhongguozhubaoyushijiancefangmiandequanwei。guojianshiyongdezuanshifenjixitongyeyanyongguojiguanlianzhaozuanshideqiegong、yanse、jingduyicipailiedengji。

钻石证书比较

　　证书权威

　　gia wukexing★★★★★

　　igi wukexing★★★★★

　　hrd wukexing★★★★★

　　在这一点上三家都没有什么可质疑的，都是国际权威机构。国际钻石dengjipingdingbiaozhunshiyouzheisanjiagongtongweixide，youtamenchujudezhengshuzhanshichangdejuedafene，binghuodequanshijiedeguangfanrenke。

　　证书基本信息

　　guojizhengshudezuanshixinxibufen，congzuanshidedaxiaozhongliangxingzhuangdaomeiyigeqiegongzhibiaodouhuixiangxishuoming，qieduimiaoshudejingqueduyaoqiujiweiyanke，birutingshenbi：48.3%，qiegongdengjiyehuixifenjigefangmianmiaoshu，eryansejingdudengji，gengshijingquedaomouyitedingjibiede。lingwai，zhengshushangyekeyifujiazuanshineibuxiacidexiangxitubiao，zuoweijingdupingjidefuzhu。

　　gia wukexing★★★★★：

　　giazaipingdingzuanshijingdushangshedingzuigaodengjiweifji(wanmeiwuxiaji)，yuweirensuoshuxideif(neibuwuxiaji)jidequbiezaiyu，tabujinyaoqiuzuanshineibuwuxia，erqiezuanshibiaomianyebunengyouhuahenshenzhipeidaihenji，zheiyangzaizuanshixiangqianjiagonghepeidaizhongjiuyaojiweixiaoxin，fouzedongzhejiuzaochengzhengshudengjidebufu。danshigiadeqiegongdengjifinish(zongtixiushidu)xiazhifenpolish(paoguangdu)hesymmetry(duichengdu);zuanshiyaobuqingkuangyibanzhitigongchicunermeiyoumiaoshu;erzuanshidijianqingkuangbuzuomiaoshu。qitazuanshixijiechicunyilaitubiaoshi，bijiaozhiguan。

　　igi wukexing★★★★★：

　　igizhengshushiyongdejingdumiaoshuzuigaoweiifjibie，yiquebaozhengshuxinxidewendingxing。igiyizuanshiqiegongxinxizuiweijingzhun，finishxiangxiaxifenweisymmetry、polish、proportion(zuanshigebufenbili)sanxiang，duizuanshidijian、yaobudengxijiemiaoshuyehendaowei。

　　hrd sanxingban★★★☆：

　　hrdzhengshushiyongjiaoduomiaoshuxingyuyan，liruzuanshiyansedebuyongd、e、fdenghuafen，ershiyongru“white”“slightly tinted white”dengduanyu，qienyixiasejijiubuzaiqufen;lingwai，hrdyouyizhongzhendui1kelayixiazuanshidekuaijie“zuanshijiandingzhengshu”，xiangduiqi“zuanshizhengshu”，neirongxinxidoubijiaojianlve。

　　证书特色信息：

　　gia sixingban★★★★☆：

　　giadezhengshuneirongshifenguding，jihumeiyoucezhongnayifangmiandexinxikeyitigong，ruyouteshuqingkuang，liru：baxinbajian，huixieruzuanshipingshuyilan。

　　igi wukexing★★★★★：

　　igitebiezhizuodebajianbaxinzuanshizhengshu，fuyouzhuanmenweigaizuanshipaishedebajianbaxintuanzhaopian，shiweiyiyijianengjiangqiegongrucizhiguanxianshidezhengshu，qiduizuanshiqiegongdeyaoqiukeyishuodadaojizhi。zhenduiteshugongyiqiemodezuanshi，igiyekeyilingwaichujuyouzhenduixingdezhengshu。chucizhiwai，igishisanjiazhongweiyikeyiweizuanshideyaobuleishekezipaizhaodejiandingjigou，weizuanshiyuzhengshudeduiyingyoujialeyizhongbaozhang。zuihou，igiyeshiweiyiweizuanshizhubaozuoguojizhengshudejigou。

　　hrd sixingban★★★★☆：

　　hrddezuanshiyansezhengshu，zhongdianzaiyucaisezuanshideyansedengjihetianranxing，yeshitese。