A representative formulation (Alloy No.752) is 65% copper, 18% nickel, 17% zinc.
(Reference - Wikipedia Encyclopedia) Mexico is rich in natural deposits of silver and the trade of silver was the origin of seaport towns such as Puerto Vallarta.
is a trade name for nickel silver and for electro plated nickel silver. There are many different formulations of alloys which fall within the general term of "Nickel Silver".
Originally a trademark of Berndorf AG., it is now used as a generic name for nickel silver, especially in Germany and Scandinavian countries. All contain copper, nickel and zinc, while some formulations may additionally include antimony, tin, lead or cadmium.
Marks used, engraved onto either the back side or the inside of each piece of jewelry include sterling, ster., 925, or .925 and 92.5.
Some may carry a symbol or initials , or some combination of these elements is also stamped into the metal indicating is was being signed by the artist or studio.
In colonial times, the precious deposits of gems, silver and gold lured Europeans throughout Mexico which led to the melding of Christian images on jewelry with the characteristics of ancient gods indigenous to the native people.
Even today, the decorations of the body with metalwork including churches and dwellings carries some of the psychological richness of religious and naturalistic forms imbued with age-old ritual, protective, or celebratory value.
Marks include: (pronounced ver-may), jewelry pieces have a Sterling Silver base metal topped with gold plating of karat gold metal.
It is often considered semi-fine jewelry, because it is made entirely of precious metals.
It is very ductile and malleable below gold and palladium (one of the platinum metals).