不同钻石证书的比较

 　　zuanshizhengshubijiaoduo，ruguoquanbulachulaibijiaoyemeiyoubiyao。woaizuanshiwangchouchubufenshiyongbijiaoduodezuanshizhengshujinxingbijiao，benwenzhuyaocongzhengshuquanwei、zhengshujibenxinxi、zhengshutesexinxi、zhengshushiyang、zhengshufangwei、zhengshuchengben、zhengshulishi、qitafuwujigefangmianjinxingzhengshubijiao。

　　证书权威性对比

　　gia wukexing★★★★★

　　igi wukexing★★★★★

　　hrd wukexing★★★★★

　　zaizheiyidianshangsanjiadoumeiyoushenmekezhiyide，doushiguojiquanweijigou。guojizuanshidengjipingdingbiaozhunshiyouzheisanjiagongtongweixide，youtamenchujudezhengshuzhanshichangdejuedafene，binghuodequanshijiedeguangfanrenke。

　　证书基本信息全面性对比

　　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。

　　证书特色信息对比：

　　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。

　　证书式样对比：

　　gia sixingban★★★★☆

　　igi wukexing★★★★★

　　hrd sikexing★★★★

　　igidezhengshushiyangjiaoduo，kegongxuanze，giazhiyoudaxiaoliangshi，xiaozhengshubufuzuanshixiacidexiangxitubiao。igidezhengshuyangshibijiaoduo，chudaxiaozhengshuwailingyoukapianshi(bianyuxiedai)、xinyongkashi(buyisunhuai)、sufengshideng，neirongxiangtongdanshikeyiyingduibutongxuyao。lingwai，giaheigidezhengshuzhizuojingliang，igizhengshugengshimeiyifendoushishougongzhizuo，hrddejiushaochayichou，kegongxuanzedeshiyangbuduo，qimeiguanchengduyeburuqianerzhe。

　　证书防伪手段对比：

　　gia sixingban★★★★☆

　　igi wukexing★★★★★

　　hrd sixingban★★★★☆

　　guojizhengshudoucaiyongyangedefangweishouduan，meiyizhangzhengshushangdouyougejigoudefangweibiaoji，wangzhandezhengshuhaomachaxunyekeyizhengmingzhengshudezhenwei。tebieshiigitigongdesufengfuwu，jiangzuanshiluoshihejiandingjieguoyiqifengcun，zhengshuhezuanshicongzheiyibuqijiubuhuifenli，bingqiefengcunchuyijingkaiqijiwufafuyuan，quebaozuanshizhidaokehushouzhongdouheqizhengshuxiangduiying。

　　证书成本高低对比：

　　gia sanxingban★★★☆

　　guojizhengshudechengbenkendingshibijiaogaode，danshibijingwuyousuozhi。buguo，giadejiandingjiageburongzhiyishisanjializuigaoangde。erqie，qisuoyoujiandingbumendouweiyumeiguobentu，wuxingzhonghuafeizailaihuiyunshushangdechengbenyepoweikeguan，jiandingsuoyongshijianchengbenyehuihengao。

　　igi sikexing★★★★

　　erigideshiyanshiquanqiufenbujiaoduo，chaoguoshige，chuqujiandingfeiyongbulun，yunshuchengbenheshijianchengbenyehuijieshengdeduo。

　　hrd sikexing★★★★

　　hrdyeyouyugiatongyangdewenti。dangran，ruguoxuanzehrddejianyibanbenzhengshu，shiyanshi*zuohuikuaihenduo，danshixiaofeizheyaozaixinxilianghejingquedushangzuochurangbu。

　　证书历史长短对比：

　　gia wukexing★★★★★

　　igi sanxingban★★★☆

　　hrd sanxingban★★★☆

　　giachuangliyu1931nian，yuanzaierzhanzhiqian，erouzhoudeigishizai1975nianqianhoukaishijinxingzuanshijiandingde，yinianzhihou，hrdyekaishicongshizheixiangfuwu。

　　总评：

　　GIA

　　三十二星

　　IGI：三十二星半

　　HRD：二十九颗星

　　其它服务

　　dedaoleyishangzheixiexinxihou，xiaofeizhezaigoumaizuanshideshihoujiukeyigenjuzijidebutongyaoqiujinxingfangxinditiaoxuanle。liru，ruguogerenduizuanshi4czhongdemougeyinsutebiekanzhong，neimejiuyinggaixuanzeduizheigeyinsumiaoshutebiejingzhundezhengshu，erqie，ruguoduiqitajigeyinsubingbuyaoqiutaigao，neimezaizuanshigoumaichengbenshangyekeyijiangdiyixie。

　　lingwai，xuanzezhengshushiyeyouxieqiaomen，biru，daiyoubaxinbajianzhaopiandezuanshizhengshuzhiyouigikeyichuju;giabuhuizuozuanshixiangqianshoushidezhengshu;hrdzhengshushangdebufenshuyubutong;hrdde“zuanshijiandingzhengshu”shiqijianyibanbendengdeng;zhengshuqianfadedidiandengdengdoushidiyiyankandaozhengshuxuyaoshibiededifang。