钻石必须买3ex切工吗

zaijinxingzuanshixuangoushi，bushaoshangjiadoushoutui “3ex”qiegong（youchengwanmeiqiegong）。3exqiegongzhizuanshideqiegong、paoguang、duichengjunweiexcellentlixiangjibie，nenggoudadaozheigeqiegongjibiedezuanshi，yongyouzuihaodehuocai，qicuicanmirendeshanguangmeilixiyinzhongrenguanzhu。

zuanshiqiegongcongsangefangmianlaikan，fenbieshicut grade（qiegong）、polish（paoguang）、symmetry（duichengxing），zheisanxiangneirongdepingpanyougezifenwei5gedengji：

· excellent（ex）wanmei：jihufanshelesuoyoujinrudeguangxian，yueyou3%dezuanshinenggoudadao；

· very good（vg）henhao：fanshechubiaozhunqiegongdengjideguangxian，yueyou15%dezuanshikeyidadao；

· good（g）hao：fansheledabufenjinruzuanshineibudeguang，yueyou35%dezuanshikeyidadao；

· fair（f）yiban：yenengfansheguangmang，danbiaoxianyiban，jiaogoodqiegonggengchayixie；

· poor（p）cha：suoyouqiegongbiaozhundoumeiyoudadao，qiegongfeichangcha；

yibanshangjiatuijiangoumai3exqiegong，zhuyaoyuanyinruxia：

1、qiegong：qiegongyouzuanshideqiegebilisuojuedingde，qiegongyuehao，shuomingzuanshidebiligengjiejinwanmei。neimezuanshiyejiuxiandeyueda、huocaiyuehao。

2、paoguang：paoguangbiaominglezuanshibiaomiandepingzhengdu，biaomianpingzhengdudidezuanshi，huiyingxiangguangzaizuanshibiaomiandefanshehezheshefangxiang，jineryingxiangzuanshidehuocai。

3、duicheng：duichengtixianlezuanshigegeqiemianpailieshifoucunzaipianyi、qingxiedengwenti，ruguozuanshideduichengxingjiaodi，huizaochengzuanshifanshejizhesheguangdepianyi，huiyingxiangzuanshidehuocaixiaoguo。

xuangouzuanshi，chulezhongliangdaxiao，zuikanzhongdeyinggaijiushizuanshidehuocaixiaoguole。erzuoweiyingxiangzuanshihuocaideguanjianyinsu，duizuanshiqiegongdexuanzeyouweiguanjian。suoyiyibanjianyizaiyusuanchongzudeqingkuangxia，jinliangshouxuan3exqiegong。dangran，ruguoyusuanbuzu，vgqiegongyeshihenbucuode。