Jewelry Markings

Gold
K       =    Karat
KP    =    Karat Plumb (exact amount of gold)
K.P.  =    Karat Plate
GF    =    Gold Filled (heavy plating) usually listed as a fraction 1/10, 1/20 
GS    =    Gold Shell
HGE =    Heavy Gold Electroplate


Silver
925 or .925 = Sterling Silver 92.5%
925NV         = Nevada Silver (made in England)
835 or .835 = British Sterling 83.5%
Sterling
Ster
.999  =  Pure Silver


Platinum
Pt
Plat
900PT
950PT