珍珠的分级

　　zhenzhushiwoguochuantongzhubaozhiyi，zaozai4000duonianqiande《haishi·houji》zhong，jiuyou“yudidingnanhaiyucao、zhujidabei”weigongpindejizai。“zhubaoyushi”zhong“zhu”jizhuanzhizhenzhu。muqian，woguoyijingxingchenglehunan、jiangsu、zhejiang、anhui、hubei、jiangxiliudadanshuizhenzhuyangzhijidi，guangxi、guangdong、hainandenghaishuiyangzhijidi，zhejiangzhuji、suzhouweitang、guangxibeihai、hainanhaikoudengzhenzhujiagong、pilingjisandi。mianduishichangshangdalianggongyingdezhenzhushipin，xiaofeizheruhequfenchanpindeyoulie、ruhexuangouzhenzhu、congnaxiefangmianlaipingjiazhenzhudezhiliangni?

　　珍珠鉴定和分类

　　yijugb/t 16552《zhubaoyushi mingcheng》、gb/t 16553《zhubaoyushi jianding》jianceyangpin，jinxingjiandinghefenleidingming：

　　genjushengzhangfangshibutong，kehuafenweitianranhaishuizhenzhuhetianrandanshuizhenzhu genjushengzhangshuiyubutong，kehuafenweihaishuiyangzhizhenzhuhedanshuiyangzhizhenzhu genjuyouwuzhuhe，kehuafenweiyouheyangzhizhenzhuhewuheyangzhizhenzhu。

　　genjushifoufuqiao，kehuafenweiyoulixingyangzhizhenzhuhefuqiaoxingyangzhizhenzhu zhenzhugenjuchanchujizhifenweitianranzhenzhuheyangzhizhenzhu，tongshigenjuchanchushuiyufenweihaishuihedanshui，yangzhizhenzhugenjuguojiabiaozhungb/t 16552-2003 zhubaoyushimingcheng，keyijianchengweizhenzhu，danyingwenmingchengrengweicultured pearl。

　　质量因素级别评价

　　congyanse、daxiao、xingzhuang、guangze、guangjiedu、zhucenghoudu(youhezhenzhu)deng6gefangmianzhiliangyinsujinxingpingjia。

　　1.颜色

 

　　zhenzhudeyansefenweibaise、hongse、huangse、heisejiqita5gexilie，gexiliebaokuoduozhongtise。ru：

　　baisexilie：chunbaise、naibaise、yinbaise、cibaisedeng; hongsexilie：fenhongse、qianmeiguise、danzihongsedeng;

　　huangsexilie： qianhuangse、mihuangse、jinhuangse、chenghuangsedeng;

　　heisexilie：heise、lanheise、huiheise、heheise、ziheise、zongheise、tiehuisedeng; qita：zise、hese、qingse、lanse、zongse、zihongse、lvhuangse、qianlanse、lvse、gutongsedeng。

　　zhenzhukenengyoubanse，rubaise、fenhongse、meiguise、yinbaisehuolvsedengbanse。 zhenzhukenengyouyuncai，yuncaihuafenweiyuncaiqiang、yuncaimingxian、yuncaiyiban。 yansedemiaoshu：yitisemiaoshuweizhu，banseheyuncaimiaoshuweifu。

　　2.大小

　　zhengyuan、yuan、jinyuanxingzhenzhuyizuixiaozhijinglaibiaoshi，qitaxingzhuangyangzhizhenzhuyizuidachicunchengzuixiaochicunbiaoshi，piliangsanzhukeyiyongzhenzhushaidekongjingfanweibiaoshi。

　　celiangzhenzhudaxiao(genjujisuankedechuzhenzhuyuandushizhengyuan、yuanhuoshijinyuan)

　　3.形状级别

　　4.光泽级别

　　5.光洁度级别

　　jingguoyubiaozhunyangpinjinxingbijiaohou，youkenenghuidechujuyouxialiexiaciqingxing：

　　6.珠层厚度级别

　　muqianjiancefangfabaokuoxguangzhaoxiangfa、octguangxuexianggancengxifazhucenghoudujiancefangfahezhijieceliangfa

　　珍珠分级标识明示内容至少包括：

　　(1)mingcheng(yingbiaominghaishuizhenzhuhuozhedanshuizhenzhu);

　　(2)珍珠等级;

　　(3)大小;

　　(4)xingzhuang、guangze、guangjiedu、zhucenghoudu(ruguosheji)、pipeixing(ruguosheji);

　　(5)shengchanchangming、changzhi;

　　(6)zhixingbiaozhunbianhao。

　　NGTC为珍珠进行分级出证

　　guojiazhubaoyushizhiliangjiandujianyanzhongxinzhuanweizhenzhuyuanzhujishipinshelizhenzhufenjijianyanyewu，chujuzhenzhufenjizhengshu，zhengshuzhongtigongyouguanzhenzhuleixing、zhenzhufenjiliudazhiliangyinsudejibie、zhenzhudengjidengxinxi，jiangweixiaofeizhemingquelejiesuogouzhenzhugefangmianzhiliangjibiexinxi，rangxiaofeizhenenggoufangxindigoumai、goumaihouyefangxin。