为什么买的钻戒复检会掉级？钻戒掉级是什么情况？

shouxian，zuanshizhongliangshibuhuidiaojide，zhuanyejiandingjigouzaijiancezuanshi/zuanjiezhongliangshidouhuicaiyongjingzhunyiqiyijizhuanyedefangfa，ruguozuanshibenshenmeiyouwenti，jiubuhuiyouzhongliangfangmiandewucha。

1、钻戒切工掉级

guoneidejiandingbiaozhunfenweiliangzhong：yigeshiluozuandefenjibiaozhun，yigeshixiangqianchengpindefenjibiaozhun。

qizhongluozuandefenjibiaozhunqishibenshenshiyinshenzisangebiaozhungia、igiyijihrdzheisangebiaozhun，suoyigiazuanshideqiegongfangzaiguoneideluozuanjiandingbiaozhunshang，douhuiduiyingdeshangde。suoyigiaqiegongfenjiheguobiaodeluozuanqiegongfenjishiduideshangde，fujianluozuanqiegongbuhuidiaoji。

guobiaogb16554deqiegongfenjifenwei：jihao、henhao、hao、yiban、cha

duiyingdegiadeqiegongfenjiwei：ex、vg、g、f、p

xiangqianchengpindeqiegongfenjibiaozhunshi：henhao(hangaijihaohehenhao)、hao、yiban(hangaiyibanhecha)

zheijiuzaochenggialuozuanqiegongfenjishiex，erxiangqianzhihoujiu“diaoji”bianchenglevg(huozheshuo henhao)。qishizheibingfeishiyangeyiyishangdeqiegongdiaoji，ershiyouyuxiangqianqiegongfenjibiaozhunheluozuanqiegongfenjibiaozhunbutongeryinqide。

2、钻戒颜色掉级

zuanjieyansediaojiyousanzhongkeneng：yansefendebuzhunque（kenengxingjixiao）、yansezaifenjiexianshang、guoneiyouxiejiandingjigoumeiyouzuanshidebiseshi。

①shouxian，yansefendebuzhunque，zheigezaidaduoshuquanweijiandingjigoushibucunzaide，bijinggia、ngtcdengjigoudejiandingshidouyouzhezhuanyedelilunzhishihefengfudejiandingjingyan。

②zuanjieyansechuyufenjiexianshang，shangshangxiaxiajunke，zheizhongqingkuangkenengdaozhizuanjieyansediaoji。

giadezuanshibiseshiyongdeshishangxianbiseshi：zhiyaobibiseshibaihuozhexiangdang，neimejiufenzaizheigejibiezhinei。

guobiaodezuanshibiseshiyongdeshixiaxianbiseshi：zhiyaobibiseshibai，neimejiufenzaizheigebiseshishangyigejibie。

biru，zaibiseshideduibizhixia，yikezuanshikanqilaiganggangdadaogiadegsebiaozhun，neimezuizhongzhengshujieguoyibanjiushi“g”se。erguoneidejiandingbiaozhunkenengjiujiangqihuafenweihjibie。

suoyikenenghuiyoushaoshuzaiyansefenjiexianshangdehuiyoushaoshudeyansediaojideqingkuangcunzai。

3、钻戒净度掉级

zuanjiejingdudiaojizhuyaohejiandingbiaozhunyouguan，yijixiangqianchengpinduijiandingjieguodeyingxiang。

①钻戒净度鉴定标准

giazuanshijingdudiaojijingchangchuxianzaisi2hevs2zheilianggejibie。

birugiadesi2jingdujibieyouyixiaobufenrouyankejiandexiaci，huibeifendaosi2zhinei，erbushipji；danguojianngtcjigouduiyuzuanshijingdujibiebawodehenyanjin，danfanzhiyaongtcchusi2jidehua，jingdujibiedoushihenyanjinde，keyizhidexinlai。

lingwaihaiyouyigejiushiifhelc，giajiangwuxiafenlelianggexiaojibie，yigeshiwuxia，yigeshineiwuxia，erguobiaoduiyuwuxiajiuzhiyouyigejibie：lc。zheishijingdujibiebiaozhunbutongsuodaozhide，bingfeifujiandiaojidefanweinei。

②xiangqianchengpinduijiandingjieguodeyingxiang

xiangqiandezuanshiheluozuanshijingdufenjiyouxiebutong，guoneibiaozhunyaoqiu，duiyuyixiangqiandezuanshifenji，zhizuodajibiefenji，zuanshiluoshicaifenxiaojibie。

liru：luozuandevvs2hevvs1douhuibeifenzaixiangqianchengpindejingduvvsjibiezhineide。yinweixiangqianjinshuyingxianglefenji，kenengzhuazidangzhulekanbudaozhuadangzhudebufenyoumeiyouxiaci，zhinengkanfenjidagai，jiushifendajibie。zheizhongdeyebusuanshidiaoji，zhishijiandingbiaozhundebutong。

yishangshiguanyuzuanjiefujiandiaojideyixiexiangguanjieshao，qishiguoneidedaduoshuzhengguishangjiaxianzaidouzhichiyizuanshuangzheng，yejiushigoumaidezuanshi/zuanjiekeyichujugiaheguojianshuangfenzhengshu，wanmeijiejuenisuodanxindediaojiqingkuang。