怎么判断一颗钻石的切工好不好

zuanshiqiegonghaobuhaochulekantadeqiegongdengji，haikeyicongqitayixiefangmianlejie。birukeyitongguozuanshideqiegongdengji，zuanshiqiegongbilidengfangmianlaikan。

panduanzuanshiqiegonghaobuhao，keyilejieyixiajigefangmian：

1、从肉眼看，好的切工火彩适中，钻石明亮耀眼。

guanchazuanshidehuocaiyijimingliangchengdu，qiegongyuehaodezuanshihuocaiyuexianyanyuemingliang（yejiushidajiachangshuodeyueshan），ruguoshiqiegebilibudangzuanshihuilouguang，neimezheikezuanshijiuhuixiangduiandan；

①haodeqiegong，shianbiaozhunbiliqiemochude，zaizuanshineibu，waibuguangxianhuicongyibanmianzheshezhilingyibanmian，ranhoucongzuanshidededingbusanchu，chengxianchuwuyanliusede“huo”。

②buhaodeqiegong，qiemobiliyebubiaozhun，zuanshicongtingbulouguang，yinciqiemohoudezuanshimeiyouhuocai，kanshangquhensiban，qiegonghenchadezuanshiyanzhongdehuichuxianheidihuoyuyanxiaoying。

2、借助仪器“切工镜”观察钻石的切工。

birujiezhuqiegongjinglaiguanchayuanzuande“baxinbajian”wanmeichengdu。3exwanmeiqiegongdezuanshidouyou“baxinbajian”xianxiang，eryou“baxinbajian”dezuanshikenengshivgqiegong，yekenengshiexqiegong。

zongzhi，keyikandao“baxinbajian”xianxiangdezuanshidoubuhuitaicha，bingqietuanxingzhuangyuewanmei，tongchangqiegongjiuyuehao。

3、通过钻石鉴定证书上钻石的各个切割比例了解切工好坏。

birugiadengdazhengzhong，youguanyuduiyingzuanshidegegezhuyaobuweideqiegebili，birutaikuanbi、quanshenbi、tingshenbi、yaohoubi、guanjiao、tingjiaodeng。

yixiatubiaoweiqiegongdengjiyuzuanshiqiegebilideduizhao：

genjubiaogeneirong，taikuanbi：52-62%、quanshenbi：57.5-60%、yaohoubi：2-4.5%...，zaizheigebilifanweidezuanshizuanshiqiegongshibijiaohaode。

putongrenzaitiaoxuanzuanshishi，zhijiechakanzuanshiqiegongdengjibianke，zuanshiqiegongyou5gedengji，conggaodaodifenbieshiexcellent（ex，lixiang）、very good（vg，feichanghao）、good（gd，hao）、fair（f，yiban）、poor（p，cha）。qizhongexcellent（ex，lixiang）shizuihaodeqiegong。