如何挑选珍贵的天然钻石？4C 标准 + GIA 认证选购技巧

jinqihuangjinjiagezougao，ertianranzuanshijiagejiangzhi 20 nianlaididian，zhengshirushoutianranzuanshishoushidejuejiashiji。danmianduizhongduotianranzuanshi，xiangxuandaojimeiliyoujutouzijiazhidekuanshi，hexinyaozhangwoliangdaguanjian ——4c biaozhunyu gia renzheng。zheipianwenzhangchaijietianranzuanshidehexinxuangouluoji，bangniqingsongbikaiwuqu，xuandaoyouzhitianranzuanshi。

一、先懂 4C 标准：天然钻石品质的核心评估指标

4c biaozhunyoumeiguobaoshiyanjiuyuanzhiding，shiquanqiutongyongdetianranzuanshidengjipinggutixi，baokuochegong、chengse、jingdu、zhongliangsidazhibiao，zhijiejuedingtianranzuanshidepinzhiyujiazhi。

1. chegong（cut）：renweiyingxiangde “shanyaoguanjian”

chegongshi 4c zhongweiyishourenweiyinsuyingxiangdezhibiao，yeshijuedingtianranzuanshihuocaidehexin。zhuoyuedechegongnengrangzuanshiwanmeifansheguangxian，sanfachuyaoyanguangmang；ruoqiegebujia，jishizuanshibenshenpinzhiyouliang，yewufazhanxianyingyoudecuican。xuangoushiyouxianxuanzeqiegongdengjiwei ex（you）、vg（henhao）detianranzuanshi，youqishiyuanxingzuanshi，3ex（qiegong、paoguang、duichengjunweiyou）dengjinengzuidahuashifanghuocai，tishengzhengtizhigan。

2. chengse（color）：yuejiejinwusejiazhiyuegao

tianranzuanshidechengseyitoumingduweihexinpinggubiaozhun，an gia biaozhuncong d ji（jiejinwuse，zuigaopinzhi）dao z ji（daimingxianhuangdiao，zuididengji）huafen。yansedengjisuizimudizengerjiangdi，yuejiejinwusedetianranzuanshi，guangxianzheshexiaoguoyuehao，jiazhiyeyuegao。richangpeidaixuan g-h sexingjiabizuigao，rouyanwumingxianhuangdiao；ruozhuiqiutouzijiazhihuojizhizhigan，kexuanze d-f sedetianranzuanshi。

3. jingdu（clarity）：chunjingdujuedingzheshexiaoguo

jingduzhitianranzuanshineibuneihanwuhebiaomiantezhengdemingxianchengdu，zazhiyueshao、chunjingduyuegao，jingdudengjiyuegao，guangxianzheshexiaoguoyeyuejia。duiyuzuanjiedengshoushi，jianyixuanze vvs dao vs dengjidetianranzuanshi，zheigequjiandezuanshirouyanwumingxianxiaci，nengchongfenzhanxiantianranzuanshideshanyaoguangmang，tongshijianguxingjiabi，wuxumangmuzhuiqiu fl（wuxia）ji，bimianguoduzengjiayusuan。

4. zhongliang（carat）：xiyouduyuzhongliangzhengxiangguan

tianranzuanshidezhongliangyikaweidanwei，1 kelayuedengyu 0.2 ke，xiaoyu 1keladezuanshichangyong “fen” biaoshi（1 kela = 100 fen）。yibanlaishuo，kelashuyuedadetianranzuanshiyuexiyou，jiageyeyuegao，qiecunzai “kelayijia”——1kelatianranzuanshidejiazhiyuangaoyuliangke 0.5kelazuanshizhihe。xuangoushixujieheyusuan，youxianquedingzhongliangfanwei，zaipinghengqitasanxiangcanshu，ruozhuiqiutouzijiazhi，jianyixuanze 1kelayishangdetianranzuanshi。

二、认准 GIA 认证：天然钻石的 “品质身份证”

xuantianranzuanshishi，gia zhengshushibukehuoquede “pinzhibaozhang”，tayoumeiguobaoshiyanjiuyuanbanfa，yiju 4c biaozhunduitianranzuanshijinxingzhuanyeceshiyupinggu，xiangxijiluzuanshidegexiangshujuyutezheng，shiquanqiugongrendequanweizuanshijiandingzhengshu。

gia zhengshufenweidazhenghexiaozhengliangzhongleixing，liangzhedehexinqubiezaiyushiyongchangjingyuxinxixiangxidu。

dazhengquanchengwei the gia diamond grading report，tongchangyongyu 1 kelayishangdetianranzuanshi，zhengshuhuifushangxiangxidejingdutu，biaozhuneihanwudejutiweizhiyudaxiao，xinxigengquanmian，shiheyongyushouzanghuotouzidetianranzuanshi；xiaozhengquanchengwei the gia diamond dossier®，duoyongyu 1 kelayixiadetianranzuanshi，suibufudaijingdutu，danhexincanshujiluwanzheng，nengmanzurichangpeidaidepinzhiyanzhengxuqiu。

wulunxuanzedazhenghaishixiaozheng，xuangoutianranzuanshishidouxuheduizhengshuxinxiyushiwuyizhi：yongfangdajingchakantianranzuanshiyaolengdejiguangbianma，querenyu gia zhengshubianhaopipei，zaitongguo gia guanwangchaxunzhengshuzhenwei，bimianmaidao “canshuxubiao” huofangmaodetianranzuanshi。

三、天然钻石选购总结：平衡品质与需求

tiaoxuanzhenguidetianranzuanshi，hexinshi “xiandingyusuan，zaian 4c xuanpinzhi，zuihouren gia zhengshu”。richangpeidaikeyouxianpinghengchegongyuchengse，xuanze g-h se、vs jingdu、3ex qiegongdetianranzuanshi，xingjiabigenggao；ruozhuiqiutouzijiazhi，jianyixuanze 1 kayishang、d-f se、vvs jingdu、3ex qiegongqiedai gia dazhengdetianranzuanshi，xiyouduyubaozhixinggengqiang。

dangqiantianranzuanshijiagechuyudiwei，zhangwo 4c biaozhunyu gia renzhengdehexinzhishi，jiunengzaizhongduotianranzuanshizhongjingzhunshaixuan，xuandaojifuhexinyiyoujujiazhidetianranzuanshishoushi。