为什么异形钻只有2ex|异形钻切工挑选标准

zaitiaoxuanputongyuanxingzuanshishi，3exqiegongshigoumaishouxuan。dantiaoxuanqitayixingzuanshi（rufangxing、lixingdeng）quefaxian，zuihaodeqiegongdengjizhiyou2ex。neimeweishenmeyixingzuanzhiyou2ex，yixingzuandeqiegongtiaoxuanbiaozhunshishenme？xiamianweidajiafenxiangxiangguanxinxi。

EX：jiexecellent（lixiang、jiyou），shizuanshidezuijiaqiegongdengji。

3EX：zuanshideqiegongdengjicong3geweidulaizonghekaolv，fenbieshisymmetry（duichengxing）、polish（paoguang）、proportion（bili）；3exjizuanshideqiegongex、paoguangex、duichengex，3exqiegongshizhenduiyuanxingzuanshisuojichudeqiegong（cut）dengjizonghepingdingbiaozhun。

2EX：duiyuyixingzuan，giadengdaduoshujiandingjigouzhiduipolish（paoguang）hesymmetry（duichengxing）pingji，zuijiaqiegong（cut）dengjideyixingzuanziranjiushidadaopaoguangex、duichengexde2ex。

giayixingzuanshizhengshuqiegongdengji

一、为什么异形钻只有2ex

yixingzuanzaizhuoxingshangfenweihenduozhong，bijiaochangjianqiehuanyingdujiaogaodeyoulixing、xinxing、gongzhufang、dianxing、tuoyuanxingdeng。zaiyixingzuanzhong，dangtadesymmetry（duichengxing）hepolish（paoguang）zaizhengshuzhongjiedadaoexecellentdengji，shuomingshijiyouyideqiegongjibie。

yixingzuanzhisuoyizhiyou2exqiegong，hetadexingzhuangyouyidingguanxi。

yixingzuanzaiqiegeshanggengzhuzhongbaozhong，duiyuanshidesunhaolvjiaodi。zaibaozhongdeqiantixia，weijinkenengdedadaojiaohaodeshijuexiaoguo，qiegeshihuigengzhuzhongsymmetryduichengxing，erbushigengweijingzhundeqiegeshuju。

yuanzuanzhongdeproportion（bili）zaiyixingzuanzhongdeyiyibuda。birushangtuzhongyixingzuandeqiegongshujujiuzhiyoulianggeshuzhi，fenbieshitaikuanbi59%、quanshenbi67.2%，suoyibuyongtaijiujieyixingzuanqiegebilishuzhihaobuhaodewenti。

二、异形钻切工挑选标准

1、异形钻切工等级

① polishpaoguang：

paoguanghuizengjiazuanshideliangdu。yixingzuandepaoguangjibiezuihaoshiexdengji，rutiaojianbuyunxu，neimezhishaoyeyaovgjibie。

② symmetryduichengxing：

symmetryduichengxingshikanzuanshigegekemianshifouduicheng。excellentjibiedezuanshigegekemianduichengwanmei，yixingzuandeduichengxingyejinliangyaoqiuexjibiede，zheiyangshuomingzheikeyixingzuanqiemodebijiaobiaozhun。

2、异形钻长宽比

duiyuyixingzuan，jishishitongyangdezhonglianghetongyangdewaixing，yehuiyouyixiebilishangdequbie。ershoubutongzhangkuanbilideyingxiang，youdeyixingzuankanqilaijiubijiaopianaipang，youdekanqilaizepianshouzhang。

butongxingzhuangdeyixingzuanduiqiegebilideyaoqiuyebuyiyang：

公主方钻石长宽比

祖母绿钻石长宽比

橄榄形钻石长宽比

椭圆形钻石长宽比

水滴形钻石长宽比

心形钻石长宽比

垫形钻石长宽比

雷迪恩钻石长宽比

duizuanshizhangkuanbideyaoqiu，kegenjugerenxihaolaixuan。

yishangshiyixingzuanqiegongxiangguanjieshaojitiaoxuanbiaozhun，zaitiaoxuanyixingzuanshishi，chuleduiqiegongfangmiandeyaoqiuzhiwai，butongxingzhuangdeyixingzuanzaiyanse、jingdufangmianyeyoubuyiyangdexuangoubiaozhun。xiaofeizhekelianxiwoaizuanshiwangzhuanyekefuguwen，huoquzhuanye、quanmiandeyixingzuantiaoxuanzhinan。