It stands for J & C Ferrara jewelry co.
That sounds like a hallmark stamp telling who made it.
It means its 14 Karat Gold.
14 carat gold
62.5 % gold
It means it's 41.7% pure or 10K gold
Gold electroplate. Not gold.
gold
The Stamp YAG Means Gold Coated Silver
It is the measurement, in mils, of the thickness of the gold plating used.
Palladium
silver
Fi 10k mean?