GIA,IDC,国标...这些鉴定机构的钻石分级标准有什么不同

GIA钻石分级体系

meiguobaoshixueyuan（gia）shizuizaoxitongditichu4cgainian、jianlizuanshi4cfenjiguizedejigou。giazai20shiji30niandaitichude4cfenjiguizezhong，zuanshideyansejibieshiyizuanshichandidediminglaimingmingde。

houlaigiayu50niandaixiugaileyuanyoushuyu，yongd~zdezimuyiciyanseyouqiandaoshendejibie。erjiudeyansefenjiguizequechengweileouzhouguojiadezuanshiyansefenjiguizedeyuanxing。xianxingdeyixiebiaozhunrucibjo、idcdengdoushizaizheiyiyuanxingshanggaijinhefazhanqilaide。

giabiaozhunzaijingdushanghuafen11gejibie，bingqiebazaiqitafenjiguizezhongrenweishiwaibutezhengdebufenxianxianghuoquexian，zuoneihanwukandai，congerzaijingdupingdingzhongcanyukaolv。youqishiduifljingdujibiedepingpanzhong，waibutezhengfeichangzhongyao。

国标 GB/T  16554-2003

woguodezuanshifenjibiaozhunshiyouguojiajishujianguanjuyu2003nian7yue1rifabu、2003nian11yue1rishishideguojiabiaozhun。zongtishangyuidcbiaozhunzuijiejin，bufenjutineirongjiejinyugiabiaozhun。

weishiyingwoguoxianyouqingkuang，woguobiaozhunbiguojishangdebiaozhunyaokuansongyixie，tesezhichushiduixiangqianzuanshijianlilejianlvefenjibiaozhun。

IDC钻石分级标准

guojizuanshiweiyuanhui（idc）shishijiezuanshijiaoyisuolianmeng（wfdb）heguojizuanshizhizaoshangxiehui（idma）yu1975nianchenglidelianheweiyuanhui，zhizaiweizuanshishangmaozhidingyigezaiguojishangpubianshiyongdezuanshipinzhipingjiadetongyibiaozhun，qiezaiquanshijiebaozhangbiaozhundeshishi。yu1979niantichule“guojizuanshifenjibiaozhun”。

yuqitazuanshifenjibiaozhunxiangbi，zuixianzhudetezhengshi5weimiguizehewaibutezhengzaijingdujibiepingjiazhongdezuoyong。qianzhedehexinshiyongbiaozhunyangpinlaijiedinglcyuvvslianggejingdujibie；houzheduilcjibiedezuanshijikeshiweiwuneihanwu，waibutezhengbuyingxiangjingdu，danxiangtongdewaibutezhengduilcyixiabiandeyange。

Scan.D.N.钻石分级标准

sikandenaweiyazuanshiweiyuanhuibaokuoledanmai、fenlan、nuoweiheruidiandeng4gebeiouguojia，yu1969niantongguole“sikandenaweiyazuanshimingmingguize”，tongchangjianxieweiscan.d.n.（scandinavian diamond nameclature）。

1980nianjinxinglegengxin，zaiyanseyujingdufenjishangyugiajiaojiejin，xianglveshangyouxiequbie。zaiqiegongpingjiashang，yiscandinavianbiaozhunyuanzuanweiyiju。scan.d.n.shiouzhouwenshizuizaodexitongdezuanshifenjibiaozhun，duiouzhougeguodezuanshifenjibiaozhundejianlihegaijinqidaocujinzuoyong。

CIBJO钻石分级规则

cibjojiguojizhubaoshoushilianhehui。1926nianshijianyuouzhou，yuanmingweibiboah，qishimingzhuyaoshiweilecujinouzhouzhubaoyedefazhan，1961nian，tazhongxinzujiangaimingweicibjo。

1970nianyouchenglilecibjozuanshizhuanyeweiyuanhui，1974niantongguolecibjozuanshifenjiguize，houyu1979nianzuolezhongyaoxiugai。cibjozuanshifenjibiaozhunduiqiegongzhongdeyuanzuanbilibuzuopingjia，renweibutongbilidezuhetongyangkeyichanshenghenhaodexiaoguo，danshixiang“yuyanshi”bilitebiebuhaodeqingkuanghuizaibeizhuzhongshuoming。

chuleyishangtidaodezheixiezuanshifenjibiaozhunwai，haiyouraldeguodezuanshifenjibiaozhun、hrdbilishizuanshigaocenghuiyidengdeng。suoyoudezheixiebiaozhunyezaibuduanwanshan，duizuanshifenjitichududaodejianjie。

butongbiaozhundeyansefenjiduibi