This refers to the India's Bureau of Indian Standards for jewelry marking. See http://www.bis.org.in/cert/hallbiscert.htm for more information.
Bureau of Indian Standards
The full name of ISI mark is Indian Standards Institute mark. It is a certification mark provided by the Bureau of Indian Standards (BIS) to signify that a product conforms to the Indian Standards as specified by BIS.
This is not a recognised mark anywhere.
Cleopatras crown was meant because she loved her jewelry
The NS mark on jewelry can be either: Newburyport Silver Company of Keene, NH National Silver Company
If what you meant is Spanish, is Joyeria =]
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?