Precious metals numbers- please help

[DIGDIG]

I know what 925 is and 585 is an early form of saying 14k, can someone tell me what others are.
Are there different numbers for 24k, 10k etc.?

 

[mjlalt]

The Percentage of Gold that each represent are as follows:

10k (Karat) is 41.66 percent Gold (10/24 = 41.66%) aka 416 or 417
14k (Karat) is 58.33 percent Gold (14/24 = 58.33%) aka 583 or 585
18k (Karat) is 75.00 percent Gold (18/24 = 75.00%) aka 750
24k (Karat) is 100 percent Gold (24/24 = 100.00%) aka 999

also
333 ---------------- 8K
375 ---------------- 9K
500 ---------------- 12K
916 or 917 ------ 22K

GE, HGE, GP, EP, = Gold Electroplate
GF, G.F. = Gold Filled

 

[DIGDIG]

How about 750? Platinum?

 

[mjlalt]

750 = 18k (Karat) is 75.00 percent Gold (18/24 = 75.00%)


Platinum PLAT, 950PT, 950 PLAT, 900PLAT 10%IRID