This is not a recognised mark anywhere.
The NS mark on jewelry can be either: Newburyport Silver Company of Keene, NH National Silver Company
14k
Ceramics
sterling silver
FJG would be the maker mark on that piece. In the US and most everywhere else if you put a karat stamp on a piece of jewelry you must also put your registered makers mark. It is that makers guarantee that it is that karat.
The mark Decesare is an Italian Designer of fine gold jewelry.
What does cm mean on jewelry?
Marked SUTH which is the mark for sterling Produced In Thailand
Jewelry is often stamped with a hallmark or makers mark of the artist or company that manufactured the jewelry. This is often in addition to karat mark indicating the gold or silver content of the metal. Feathers are often used as a hallmark by Native American jewelry makers.
Mark Behrens sings the Shaw's Jewelry Jingle. Mark even writes his own jingles and is very much in anything to do with jingles.
it means certified jewelry.. by the gold council..its safe to buy it.