为什么有的一克拉钻石看起来还没有80分的大？

zhengchanglaishuo，zuanshiyuezhong，chicunyueda，danyoushihoudajiakeyifaxian，80fenzuanshikanqilaibiyikelazuanshigengdayixie。

yikelazuanshikanqilaibi80fenzuanshixiao，zhuyaoyouyuqiegebilibutong，zaiqiegezuanshishi，ruguozuanshitaimiankuandubugou，weileshizuanshidadaoxiangyaodezhongliang，youxiezuanshihuijiangzhongliangjizhongyuyaobu，zuizhongdaozhizuanshiyaolengjiaohou，danchicunjiaoxiao。fanzhi，ruguoxiangyaozuanshizhijingbianda，yekeyijiangyaoweibianbo，zengjiataimian。

biru，anzhaobiaozhundeqiegebili，yikelazuanshidezhijingyinggaishi6.5mm，zheiyangdezuanshiqiegebilishibijiaohelide；

biaozhunqiegebilidezuanshizhongliangyuzhijingduizhaobiao

youyuqiegongbilibutong，yixiezuanshizhijingzongshipianxiaoyixie，you1keladezuanshizhijing6.4mmhuozhe6.3mm，shenzhiyou6.0mmde。kanqilaijiuzhiyoubajiushifendedaxiao。

qiegebilibutongdezuanshizhijingduibi

怎么挑选更大的钻石？

zhijingyueda，zuanshichicunjiuyueda。zaitiaoxuanzuanshishi，zhuyikanzhengshushang“chicun(measurements)”yilan，biruyikelazuanshi，keyixuanzezhijing6.3mmyishangde，kanqilaibuhuixiandehenxiao。

xuyaozhuyi，goumaizuanshi，bunengyiweiditu“da”。

zuanshitaimiandaxiaoshiyingxiangzuanshizhijingdeguanjian，ruguotongdengzhongliangdezuanshitaimianqiededa，zuanshisuiranhuixiandeda，danyehuijiangdihuocai；yincishidangdeqiegongbilishifenguanjian，keyizaibaozhengzuanshidadao3exqiegongdeqiantixia，xuanzezhijinggengdadezuanshi，zheiyangcainengshizuanshikanqilaichicundabingqiejuyoujiaojiahuocai。