請問這條Tiffany & Co.項鍊 單鑽是幾克拉？

請問這條Tiffany & Co.項鍊 單鑽是幾克拉？
http://zh.tiffany.com/jewelry/necklaces-pendants/cross-pendant-GRP02372/cross-pendant-11836615?trackpdp=pr&siteid=27&prolookupsearchadd=&prolookupsearchwn=&prolookupsearchradio=&prolookupsearchcheck=

這條是同一個款式 單鑽是幾克拉？
http://zh.tiffany.com/jewelry/necklaces-pendants/cross-pendant-GRP02372/cross-pendant-11408303?trackpdp=pr&siteid=27&prolookupsearchadd=&prolookupsearchwn=&prolookupsearchradio=&prolookupsearchcheck=

感謝各位神人解答