具体案例分析GIA钻石国检掉级原因

 　　henduogiazuanshiquguojianjigouqufujianhou，douhuichuxiandiaojixianxiang，womenzhidao，wulunshenmedifangdezuanshi，doushiyizuanshi4cweikaohebiaozhunde，weishenmehuichuxiandiaojixianxiang，xiamianxiaobianjiuyijutianliweidajiafenxi，zhengshubutong，zuanshiweiheyaodiaojibie。

　　GIA美国宝石学院证书：

　　giashizuanshi4cfenjidechuangshizhe，yongyouquanqiuzuidadebaoshixuetushuguan，shiguojizuanshifenjixitongdegongtongfayuandi。zongbushezaimeiguo，gongyuan1931nianyoumr. robert shipleysuochuangli，zhijinyiyou80duoniandelishi，giamingyushangshifeiyinglijigou，jingfeiyouzhubaoyejierenshijuanxian，jiandingzhengshupojugongxinli。tabujinshimeiguodiyisuobaoshixuexiao，tongshiyezaiquanqiuzhubaoyejieguangshoutuichong。

　　NGTC国检证书：

　　ngtc quanchengweinational gemological training centre lishuyuguotuziyuanbuzhubaoyushishoushiguanlizhongxin，zhangqiyilaiyizhizhiliyuzhubaozhiyejiaoyuheguojiazhubaoyushibiaozhundetuiguanghepujigongzuo。chengdanzheguojiarenshibuhecaizhengbuquanguozhucezhubaoyushizhijianshi(cgc)hezhuce(zhubao)zichanpinggushi(cpvg)zhiyezigedepeixun，tongshiyeshimeiguobaoshixueyuan(gia)zaizhongguodaluweiyidehezuohuoban。zaiguonei，shuyuzuiquanweidezhubaojiancejigou。

　　yangpinqingkuangweitongyilizuanshi，lianggebutongdejigoujiancechudeyansedengjibuxiangtong。jianxiatu：

GIA钻石证书上对该颗钻石的颜色标示

NGTC钻石证书上对该颗钻石的颜色标示

　　changguiqingkuangxia，mouxiegiazhengshudehuopinnadaoguoneizuozhengshu，yansehuijiangdiyigejibie。danshizheilizuanshibujiangjifanertishengyigejibie。shigiazhengshubuguoguanhaishiguoneingtczhengshubuguoguan?

　　womenxianlaikanyixialianggejiandingjigoucaiyongyansebiaozhun。lianggejigouzuanshiyansefenjidoushicaiyongduibibiseshidefangfa。jiuhaobia、b、csangerenfusebuyizhi，ajiaobai;bjuzhong，czuihuang。aheczuoweiyangpin(biseshi)，bshidaiduibideren(daifenjizuanshi)。dangbzhanzaiaheczhijianshi，bsefusebiahuang，danbicbai。ruguozheizhongqingkuangzaigiashiyanshi，bdefusejiudingweiheayiyangdeseji。ruguoshizaiguonei，jiubabdingweicdeseji。

　　giacaiyongdeshiyansedeshangxianbisefa，guoneicaiyongyansexiaxianbisefa。suoyi，mouxiegiadezuanshinadaoguoneizuozhengshushi，yansehuidiaoyiji。

　　congzhongyekeyikanchusuiranbabdingweiayiyangdefusejibie，danshiahebdeyansehaishiyoufenbiede，yejiushishuo，zaizuanshideyansezhong，d/e/f/gdengyansejibiedaibiaodebushiyigeyansededian，ershidaibiaoyidingdeseyufanwei。

　　就算两粒钻石同样是H色，有可能颜色也不相同。

　　anzhaoyishangdeguandian，zheilizuanshigiazhengshushiise，guojianzhengshuyinggaishijsecaidui，weishenmezuochudeguojianshihseni?kenenggenyixiayuanyinyouguan：

　　1、zuanshifenjishirenweideyigeguocheng，zhuguanxinghenqiang。kenenggendangshidexinqing、yanjingdepilaochengdu、dangshirenyuandexintaiyouguanxi(shuobudingzuowanganggenxifuerchaojia)。

　　2、yeyoukenengshouwaijieguanxideyingxiang，birudangshidetianqi，lianggeshiyanshichuanghuheyangguangderushejiaodu，fenjideshijian(shangwuhexiawu)dengyinsuzongheyingxiang。

　　zongshangsuoshu，xiaobianrenwei，buguanshigiazhengshuhaishingtczhengshu，yansejibieyouchaju，bingbunengshuomingnayigedui，nayigecuo。youdehuozuochulai，jibiexiangtong；youdehuozuochulai，giajibiehuigao，youxiehuozuochulai，giajibiehuidi。ruguojiujieyuzheiyidianbufang，xiaofeizhejianghuihentongku，shangjiayehuihentongku。

　　zheijiuhaobishijiandinglv：zhiyouyikuaishoubiao，keyizhidaoshijian;yongyouliangkuaihuozheliangkuaiyishangdeshoubiaobingbunenggaosuyigerengengzhunquedeshijian，fanerhuizhizaohunluan，huirangkanbiaoderenshiquduizhunqueshijiandexinxin。gengduozuanshixiangguanzixun，qingduoduoguanzhuwoaizuanshiwang。