钻石没有证书可以买吗？

       zuanshizhengshuyibanzhizuanshidengjijiandingzhengshu，zheiyeshidajiagoumaizuanshishidecankaoyiju，duiyuxiaofeizhegoumaizuanshiyoufeichangzhongyaodeyiyi，danbingbushisuoyouzuanshidouyouzheiyangdezhengshu，biru20fenyixiadezuanshi。

       不是所有钻石都有证书

       guojishangyibanshi30fenyishangdezuanshicaichuju“4c”fenjizhengshu；erguoneizeshiyiguobiaoweijizhun，guidingwei0.20ct(20fen)yishangdezuanshibixuchujuzuanshi4cfenjizhengshu，er20fenyixiadezuanshiyouyuqibenshendaxiaojijiazhidexianzhi，zhichujucankaoyiyidezuanshifenjizhengshuhuobuchuju。

       baoyushiguojiabiaozhunzuanshifenjibiaozhunbiaoming：weixiangqianpaoguangzuanshizhiliangdayudengyu0.0400g(0.20ct)，xiangqianpaoguangzuanshizhiliangzai0.0400g(0.20cthan)zhi0.2000g(1.00cthan)zhijian。genjucibiaozhundezhi，20fenzuanshimeiyouzuanshifenjizhengshu。danshi20fenyixiadezuanshi，queshikeyijichuguojianbiaozhundejiandingzhengshude，zhengshushangbixuyou：riqi，bianhao，zongzhiliang(shizhong jinzhong) ，waiguantezheng，yanse。

       yibanshichangshangmianxiaofenshudezuanshiduizuanshijingdu、zuanshiqiegongdengdeyaoqiubugao，yinweijingduyansedouhenhaodezuanshishihennandede，ruguozhenyouzheiyangdezuanshi，yehuiqiemochengbijiaodadeluozuan，daxiaobuhuishi20fenyixia。bingqie20fenyixiadezuanshishimeiyoushouzangjiazhide，zhinengzuoweizhuangshipin，suoyiguojianzhengshuduiyu20fenyixiadezuanshibufendengji。

       为什么20分以下钻石没有证书

       duiyu20fenzuanshiyoumeiyouzhengshuzheigewentishizheiyangrenweide，20fenzuanshiyibanbuzuoweizhuzuan，dadouyonglaizhizuoqunxiangshoushi，eryouduokexiaoyu20fenzuanshizhichengdeshoushi，youyusuizuanshuliangjiaoduo，qiyansehejingdubukenengwanquanyimoyiyang，zhubaojiandingjigouyebukenengweiyigeshoushishangdesuoyouzuanshichujuzhengshu，zheishinanyichujuzhengshudeyuanyinzhiyi。

       钻石没有证书可以买吗

       20fenyixiameiyouzuanshidengjizhengshudezuanshishikeyigoumaide，danzuihaoyouguojianchujudebiaozhunjiandingshu。ruguomeiyourenhezhengshu，neimezaigoumaideshihouyidingyaozhuyixuanzexinyuhao、xindeguodeshangjia，bimianmaidaojiazuanshideng；30fenjiyishangzuanshiyidingyaoyouzuanshidengjijiandingzhengshu，youqishi1kelayishangzuanshi，zuihaoyougiazuanshizhengshu，fangmianchayanzhengshujizuanshishifouduiying，bimianshangdangshoupian。