钻石腰码是什么？钻石腰码一定是gia开头吗？

zuanshiyaomajiushikezaizuanshiyaolengchudezimu+shuzibianma，ermeiyikezuanshiyaobubianmashuzidoushibuyiyangde，xiangdangyuzuanshideshenfenzheng。zuanshiyaomayeshizuanshizhengshubianma，shouzhengshuleixingdeyingxiang，zuanshiyaomayefenweibutongleixing，birugiazuanshiyaoma、igizuanshiyaomadeng，xiamiandailaizuanshiyaomaxiangjie。

一、钻石腰码种类

1、giazuanshiyaoma：

giameiguobaoshixueyuan，chengliyu1931nian，shizuanshi4cdengjibiaozhundezhidingzhe。guoneihenduoxiaofeizhejunyigiazhengshuweicankaobiaozhun，giazuanshiyaomayeshizuijudaibiaoxingde。giacaiyongxiandaileishejiguangjishu，jiangbianmayinzaizuanshiyaobu，ziyinqingxi，baocunshijianzhang。giazhengshushangdebianmayuzuanshiyaomayizhi，qieyizhengyiwu，duyiwuer。goumaizhekeyitongguozuanshiyaomazaigiaguanwangzhongchaxunzuanshizhengshu，binglejieqidengji、chicundengzuanshidexiangxixinxi。

2、igizuanshiyaoma：

igiguojibaoshixueyuan ，chengliyu1975niandeshijiezuanshizhongxinbilishideanteweipu，keyishuoshidierdazuanshijiandingjigou。igiyeduizuanshijinxinglebianhao，zaiyaolengchuyijiguangkezi。

二、为什么有些钻石没有腰码

1.jibianshigiazuanshi，yebingbuhuiquanbudouyouzuanshiyaoma。

1kelayishangdegiazuanshiyouxieshimeiyouleishemade，zheishiweilejinkenengbaochidazuanshizaigegefangmiandewanmeixing，chufeisongjianzuanshidekehuyoutebieyaoqiu，giacaihuizaidadezuanshiyaobukeleishebianma；eryikelayishang（hanyikela）degiazuanshizaiyaobujialeishebianmaxuyaodandushoufei，weilejieshengfeiyong，youdezuanshiyezhijieshengquzheiyibuzhou。

2.youxiejiandingjigoubuzuozuanshibianma

changjiandezuanshiyaolengbianmayougiabianma，lingwaihaiyouigibianma、hrdbianma，erchulezaizheixieguojijigoujiandingdezuanshi，yixiezhizaiguoneizhijianbumenjiandingdezuanshi，yemeiyouzuanshibianma。

lingwai，bingbushisuoyoukaicaidezuanshidouhuisongqujiandingjigouzuozhengshu，neimezaichuzhengshuzhiqian，ziranyedoumeiyouzuanshiyaolengbianma。

三、如何观察钻石腰码

zuanshiyaomabingbunengzhijieyongrouyankandao，ershixuyaozhuanyegongju。biru，keyishiyong10huo20beifangdajingguanchazuanshiyaobu，kannagedifangyinyinyueyueyouheiseziti。zhaodaozheigedifang，zaidiaozhengyidingjiaodu，liyongfangdajingjiukeyiguanchadedaole。

四、如何鉴别GIA钻石腰码

ruguoyujiantaozhengdezuanshi，zuanshibianmakenengjiushiweizaode。zaojiashangmenhuiliyonggongjuzaizuanshishangkeyinsuoweide“zhengshubianma”，dajiakeyitongguoyixiajidianlejiegiabianmazhenjia：

1、gialeishemaziyinshifouqingxi，wulunshijianduojiuzhiyaobudamoyaoleng，yaomadoubuhuixiaoshibianqian。

2、gialeishemadakeshifouguifan，zitiguizheng，buqingxie，buyinzang。

youxiexiaofeizhejiangzuanshibianmadangzuozhenjiajiandingbiaozhun，danzheizhongxiangfayebingbuwanquanzhengque。ruyishangsuoshu，bingbushisuoyoudezuanshidouhuizaiyaolengchukeyinbianma。