为什么要买3EX切工级别的钻石？

在钻石切工分级标准中，EX = Excellent（完美）、VG = Very Good（非常好）、G = Good（好）、FR = Fair （一般）、Poor（差）。

zuanshiqiegong（cut ），zhuyaoyouqiege、duicheng、paoguangsanbufenzucheng。3exjiushizhiqiege，paoguang，duichengsanxiangdoudadaoleex，shiwanmeijibie。

为什么要买3EX切工级别的钻石

ruguozuanshiqiegongjiaocha，zhengtikanqilaijiuhuixiandehenandan，quefazuanshiteyoudehuoliheshanyaomeili，jiazhiyehuidihenduo。er3exqiegongjibiekeyizaigengdachengdushangbaozhengzuanshidehuocaiheliangdudengguangxuebiaoxiandeyouliangxing。

zaixuanze3exqiegongdezuanshideshihou，ruguoyusuanzugou，keyishidangtiaoxuanyixiabilishuju，zheiyanghaikeyizai3exqiegongzhongjinxingbilifangmiandeyouxuan，keyidadaogenghaodeqiegongbiaozhun，binglingzuanshikanqilaigengjiacuicanmiren。

xiamianshiyixiezhuyaoqiegongbiliyouxianshuju：

· taikuanbi57%~60%

· yaohoubi3.5%~4.0%

· guanjiao33.5°~35.5°

· tingshenbi42.5%~44.5%

giazuanshiqiegongfenjidepingjiabiaozhun

是否必须要买3EX切工级别的钻石

3exqiegongdezuanshililunshangqueshihuocaigenghao，dangiapingjitixixia，3vgyishangdeqiegonghuocaiyijingzugouhao。

zuanshiqiegebilicepingdeshizheikeyuanzuandetaikuanbi，tingshenbi，yaohou，quanshenbi，guanjiaojiaodu，tingjiaojiaodudeng；giabiaozhunxiaexqiegebililidetaikuanbishi53%-58%，ruguotaikuanbidadao59%，neizheikezuanshideqiegebilijiuhuidiaodaovgqiegong。zheizhongxiweidechaju，bingbuhuidaozhizhengkezuanshiandanwuguang。

jibenshanglaishuo，3exgenvgyishangdegenbenchajushizaizuanshidezhijingfangmian，vgyishangqiegongzhijingdabufenshixiaoyu3exde。biru3exzhijingzai6.4--6.5zuoyou，ervgqiegongdezhijiezeshi6.2--6.3zuoyou。

zongdelaishuo，zaigoumaizuanshishi，tiaojianyunxudeqingkuangxia，keyijinkenengmai3exjiyishangqiegongjibiede。danzaiyusuanyouxianshi，yekeyigoumai3vgyishangdezuanshi。vgyixiaqiegongdezuanshibujianyigoumai。