Your UD could mean Universal Designers If someone uses that name. There are many unified marks. Your UD could only be one of three things a trademark ,a jeweler, or a designer. What does 14kb mean on gold? what is 14kb gold worth.

What does 925 UD on a ring mean?

These rings have “925” stamped on them, meaning that they are not made of solid gold. 925 is a standard sign used to mark sterling silver, and the meaning of the stamp is that the silver content in the piece is 92.5% (i.e., the remaining 7.5% is comprised of other elements).

What does 925 UD mean on a bracelet?

The stamp 925 is used to identify genuine sterling silver jewelry, which contains 92.5% silver. … Functional silver jewelry is often made with 92.5% silver. The remaining 7.5% of metal in 925 sterling silver is most commonly copper, however, some silversmiths opt to add durability with alloys of zinc or nickel instead.