no such thing
it's a 9K gold
9K= 9 karats GF=Gold Filled ST=(possibly means sterling)
37.5 % metal (either Gold or Silver)
375 is 9k gold.
It indicates that the ring is made of 9k gold. Probably European in origin.
Better to lose a 9k gold ring than a 18k one ! 18k is purer gold than 9k.
In United States Of Amirica Don't has value 9k of alloys soft gold !
gold bracelet makrd RW on clasp inside a diemond shap
9k 9 Karat Gold usually sold in the UK10k10 Karat Gold
It means 9 karat or 37.5% gold and designed or made in Italy
10K is the minimum US standard and is 41.6% gold with other base metal. 9K is available in Europe and contains 37.5 % gold.