Below are some common markings that will help you determine the purity of your items.
KP=Karat Plumb (means that item is actual karat marked)
375 = 9 Karat=37.5 % Gold
417 = 10 Karat= 41.7% GOLD
585 = 14 Karat =58.5% gold
750 = 18 Karat =75% gold
917 = 22 Karat -91.7% gold
These markings indicate that the items does not have enough gold content to refine.
K.P., GP, KGP, GEP, HGP, HGE, EP, GE, GB =Gold Plated
KGF, GF, 1/20= Gold Filled
925, Ster, Sterling, Mexico = 92.5% Silver
900, Coin Silver, Pure Coin = 90% Coin Silver
800 = 80% Silver
These markings indicate that the item does not have enough silver content to refine.
EP, EPS, EPNS = Silver Plated
Oneida, Rogers, Triple Silver, International Silver, Community Silver, Heavy Plate = Silver Plated