裸钻证书与成品钻石证书的差别有哪些?

　　luozuanzhengshuyuchengpinzuanshizhengshudechabieyounaxie?

　　jinjinianlai，luozuandingzhiyuelaiyuechengweilerenmengoumaizuanjiedexinxuanze，renmenzixingqugoumaidaiyouguojizhengshuhuozheguoneizhengshudeluozuan，ranhouxuanzeheshikuanshidezuantuoquxiangqian，zheiyangzuochulaidezuanjiebujinzaikuanshishangjiarulezijidechuangyiershixingjiabijiaogao，keweishiyijuliangde。danshi，henduorendouhuifaxianzuohaodechengpinzuanshishoushizainaquzuozhengshu，qichushidejieguohezhiqianluozuandezhengshuwangwanghuiyouyixiechayi，tongshiyigezuanshi，weihehuiyouzheimedadechabieni?

　　shouxian，chengpinzuanjiezhengshudoushiguojianzhengshu，shiyouguojiazhubaoyushizhiliangjiandujianyanzhongxinchujude，erluozuanzhengshuyougia(meiguobaoshixueyuan)、iga(guojibaoshixueyuan)、dga(yingguobaoshixueyuan)、hrd(bilishizuanshigaocengyihui)yijingtc(guojiazhubaoyushizhiliangjiandujianyanzhongxin)deng，chulengtcwai，qitadedoushiguojibiaozhun，suoyichengpinzuanjiezhengshuhuiheluozuanzhengshushaoweiyouxiechuru。lingwai，chengpinzuanshizhengshushiyouyouluozuanjiagongchengzuanjiezhihouzaiqujianding，huishoudaohenduoyinsudeyingxiang，birukuanshi，zuantuodecaizhideng，zheixiedoukenengduizuanshide4cbiaozhundejiandingchudezhishuyouyingxiang。neime，luozuanzhengshuyuchengpinzuanshizhengshudejutichabieyounaxieni?xiamian，xiaobianjiucongzuanshide“4c”shangjutijidajiafenxiyixia：

　　zhongliang：zhongliangzailiangzhongzhengshuzhongdouzhunquebiaozhuchulaile，zheidianmeiyouqubie。

　　yanse：chengpinzhengshuzhongdeyansebiaozhuweif~g，shiyigefanwei,yuanyinshixiangqianhaohousongjian，youyujietuodeyansehuiduizuanshichanshengyingxiang，yinerwufazhunquepandingchuyanse，suoyizhinengjichuyigefanwei;erluoshijiancebutong，yinmeiyourenhedezhedangyingxiang，keyizhunquepandingchuyanse，suoyijichudeshiyigejutizhi，erbushifanwei。

　　chengpinzhengshuyansebiaozhufangshi：d~e f~g h i~j k~l m~n

　　guanzuanzhengshuyansebiaozhufangshi：d e f g h i j k l m n

　　jingdu：yuyansejianceyiyang，youyujietuodezhedang，jianceyuanwufakanqingzuanshiquanbutezheng，yinerzaichengpinzuanjiezhengshushangzhishigedajibie，youshivs1deluoshixiangqianhaohousongjian，chengpinzhengshuyoukenenghuidingweivvsji，erguanzuanzhengshuzebutong，meiyoumohudezhi，tongshikeyijingquedaoxiaojibie。

　　giadejingdufenwei：fl if vvs1 vvs2 vs1 vs2 si1 si2 i1 i2 i3

　　zhongguodejingdufenwei： lc vvs1 vvs2 vs1 vs2 si1 si2 p1 p2 p3

　　qiegong：youyuwoguogongqiebiaozhushiyongshujubiaozhude，yinerdajiakanshizuihaoduiyingguobiao，yaobukenengkanbudong。erguowaidegiabiaozhubijiaorenxing，yongex(wanmei)，vg(feichanghao)，g(hao)，f(yiban)，p(cha)laishuoming，henzhiguan。

　　yishangjiushiluozuanzhengshuyuchengpinzuanshizhengshudequbie，zongdelaishuo，luozuanzhengshudefenxishujuyaobichengpinzuanshizhengshudejingque。danshiwulunnayigezhibiaocuoyigedengjijiageshangjiukenenghuiyouchengqianshangwandechabie。liru，womenzaigoumaixiangqianhaodezuanshishoushishi，yi《chengpinzhengshu》zhongdeyansei~jweili，shangjiashiyiisuanjiagede，haishiyijsuanjiage，womenwanquanbuqingchu，zheijiuhuijiyixiewuliangshangjiadailaiyicichonghaodejihui，yiisedejiagebajsedehuomaijixiaofeizhe。luozuandingzhishibaozhengzuanshizhiliangdeyigejiaohaoxuanze，woaizuanshiwangzhengzhouluozuandingzhitiyanzhongxinjiagejiaoshangchangzhijiang30%-70%，30fenyishangzuanshingtchegiashuangrenzheng，qidaidajiadeguanglin。