GIA证书是如何制定切工分级的

　　成品钻石的比例和修饰度进行的评价和说明，直接影响钻石的亮度和火彩的整体效果及两者间的平衡关系，很重要。GIA证书体系zhong，excellentweiwanmei，very goodweihenhao，goodweilianghao，fairweishangke，poorweicha。

　　goumailuozuanshihouliangzhebuyuyikaolv。qiegong(cut)ciyihengliangbiaozhun，shiweiyiyoujishurenyuandecaozuo，errangzuanshizhimeinenggouzaitishengdeyixiangzhongyaoyinsu。qiegezuanshimiandedaxiao、bili、duicheng(symmetry)hepaoguang(polish) dexiaoguozaijia shangqiegemianjiaodudebianhua，erchanshengdezuanshijingangguangzejiukeyiyouliangdu、huocaiheshanshuo。qiemozuilixiangdebiaozhunjiushibazheisanzhongzhibiaopingjunbiaoluchulai。

　　giatongguolexuduoniandeyanjiuyijijileishujufenxihou，tuichulexianjindezuiwanshandeyitaoqiegongfenjipingdingdexitongfangfa，giazuoweizuanshifenjidebizu，cong05niandituichuzuanshiqiegongfenjihou，jishichanghexiaofeizhedailailegengjiandanhexianeryijiandeduizuanshipingduanbiaozhun，giadeqiegongfenjihaixuyaojiezhuhenduozhuanmenyiqishebeicaikeyiwanchengde。

　　yinciextebieshi3exdegiazhengshudezuanshi，dequecongwaixinghaishizhengtiganjuedoushiwanmeide。

　　xiushidu(finish)：paomozuanshidezuihouyidaogongxudepingjia。fenweibiaomianpaoguangheduichengxinglianggeneirong。

　　paoguang(polish)zhuyaoshipanduanyouwumingxiandemolunwen(wheel mark)huoshaoshanghen(burn mark)decunzai。

　　duiyupaoguangdepingjiayou：excellentwanmei、 very good henhao、 good hao、 fair shangke、 poorcha。

　　duichengxing(symmetry)：qiegongpingjiadeyixiangneirong。zaipingjiashifenchengzhuyaoduichengxingheciyaoduichengxinglaipingjia，zhuyaoduichengxingquexianduizuanshidewaiguanmeiyouxianzhudeyingxiang，ciyaoduichengxingquexianduiwaiguanmeihejiazhiyingxiangbuda。

　　zhuyaoduichengxingquexianbaokuo：yaolenglunkuobuyuanhua、taimianpianxin、dijianpianxin、bozhuangyaolenghuoqingxietaimian。

　　giazuanshifenjitixizhongfenweiexcellentwanmei、very good henhao、good hao、fair shangke、poor cha。

　　所以我爱钻石网tixingningoumaizuanshishiyaoduojiazhuyizheifangmiane。tongshihuanyingninlaiwoaizuanshiwangxuangouyouzhizuanshi。