Well, darling, that stamp means your diamond pendant is made of sterling silver. The "925" indicates it's 92.5% pure silver, and the "FA9" is likely a manufacturer's mark or code. So, you've got yourself a fancy piece of jewelry there, honey.
WhAt does a pendant stamped NVC mean
Vargas
92.5 sterling silver coated with 12 karat gold. made in china.
This may be an identifier of the setting stamped there by the manufacturer.
That sounds like a hallmark stamp telling who made it.
Not enhanced in terms of pearls
What does r1 14k
More than likely, the 12 stamped in your ring means that it is 12 karat gold.
What does it mean
Heavy Gold Filled..
925 is the stamp for sterling silver.
It could mean gold electroplated with 10K gold. And, if the band is plated, the stone is not a diamond.