全球通用证书GIA证书的防伪标识

 　　zaiguojizuanshixingye，youhenduobutongdechandi，butongdepinzhi，danzaizuanshijiandingzhengshufangmiandajiaquedourenkegiafangweizhengshu。giazhengshushimuqianshijieshangzuiquanweidezuanshijiandingzhengshu，yeshizuibeigeguojieshouhezuitongyongdezhengshu。giazuanshizhengshuzhisuoyiweiquanqiuzuanshixiaofeizhesuorenke，bujinjinshiyinweigiazhengshudeguojiquanweixing，gengyinweigiazhengshuneijingyiqiujingdefangweijishu。

　　一、GIA证书的来历

　　1931nianrobert m.shipleyxianshengchuangligia，jimeiguobaoshixueyuan(gemological instituteof america)，giashibazuanshijiandingzhengshutuiguangchengweiguojihuadechuangshizhe。

　　二、GIA证书在国际钻石行业的地位

　　giashifeiyinglijigou，jingfeiyouzhubaoyejierenshijuanxian，zhuyaofuwufanweizaizhubaojiandingjizhuanyezhishidejiaoyuyuyanjiu，shenshouquanqiuzhubaoyederentong。zhijingiazaiquanqiuyiyoushisigejiaoxuejigou，tigongzhuanyedeyanjiu、xiaoshou、jiandingdengkecheng，peiyanggaosuzhidezhubaocongyerenyuan，yecuchenggiazaiyejieyoucichonggaodeshengyu，zairangdazhongduitadexinlaiduyuzhuanyexingfangmianshizhongbaochilingdaozhedediwei。

　　三、GIA证书采用的防伪技术

　　giazhengshushimuqianshijieshangzuitongyongdezuanshijiandingzhengshu，tacaiyonglezhuduodefangweijishu。giadefangweijishu，qizhuyaofenweiyixia5dian：

　　1. 证书网络核对

　　giajiandingdemeiyikezuanshidouyouzijidandudebianhao，giahuibazheikezuanshidesuoyoujiandingxinxidoushouludaotadeshujukulimian。erwomenzhixudenglugiadeguanwang，bingshuruzuanshidezhengshuhaohezhongliangjiukeyijinxingshujudeheduile。

　　2. 腰部刻字

　　giatigongdeyixiangshoufeifuwu，jibajingqijiandingzuanshideduiyingbianhaoyongjiguangkedaozuanshideyaobu。xiaofeizhezhiyaoliyongzugoubeishudefangdashebei，suishidoukeyichakan。

　　3. 水印

　　jianggiazhengshuyingxiangguangyuanguancha，keyikandaogia logodeshuiyin。

　　4. 微印线

　　giazhengshuzhongjingdu、yanse、qiegongjibieliebiaobufendeshuxianshiyougiadeyingwenquanchengweiyinpincheng。10beifangdajingxiaqingxikebian。

　　5. giateshulanseyoumodiwen

　　zhengshuzhongfenjipingjiabufendediwen，caiyonggiateshuyoumopenyin，chengxianzuanshixingdediwen。

　　四、GIA证书几乎没有仿冒的

　　dangran，zhuyaoyuanyinbujinshiyinweigiadefangweiyijingzuodegouxile。erqiecongzaojiazhedexinlikaolv，danfanzaojia，wuwaihuxiwangtongguoyijiamaozhen、yicichonghaoerhuoqubaoli。erliangke4cpingjiayizhidezuanshi，qijiazhiyejibenyiyang。jiyuci，womenkeyizuochuyixiapanduan：buhuiyourenqujiyikezuanshizuo4cpingjiayuqiyingyoupingjiayizhidegiajiazhengshu，yinweitawanquanbuhuicongzhongdedaoewaidehaochu，fanerhuichengdanjidadefengxian。tongshi，yuzuanshixingyekandebishengminghaizhongyaodexinyuxiangbi，yebucunzaidanchunweilejieshengneidianzhengshufeierzaojiadeyouyin。yinci，womenwanquanmeiyouliyouhuaiyiyikepinzhiyuzhengshumiaoshuxiangfuzuanshidegiazhengshudezhenwei。

　　keyishuo，zaihendachengdushangzhengshiyishangzheisidianranggiafangweizhengshuchengleshijieshangzuitongyongdezuanshijiandingzhengshu!