If the necklace is silver it means it was made using Sterling silver.
noggin ruckus
It means that its 2500
Hallmark 962
I had the same thing stamped on my 10k gold necklace. I called a jeweller and they weren't very helpful but they told me it was most likely the brand name.
725 stand in the necklace it is very low silver. For Real!
what does ce stamped on the inside of a ring stand for
worldwide
GB can mean the following: Gold bond, which in case it is less than real. It could also stand for the makers mark or a specific hallmark relative to the country the ring was made.
L stamped inside a ring
Gold Plated
It might be someone's initials.....
Self Addressed Stamped Envelope