Can you remove 9 letters from 'triangulation' to get a piece of jewelry?
It almost always means that the piece of jewelry is Gold Plated over a Silver piece of Jewelry I work in the jewelry business and the above answer is incorrect. 585 is the stamp for a peice that is 14K gold. If it is plated it will have additional letters such as GE for gold electroplate or GF for gold filled. If it is stamped 585 P that stands for plum and has been tested to be 14K solid gold.
The numbers on a silver jewelry clasp are used to measure the precious metal content of the piece. For examples if the numbers on a clasp read 999 then the piece consists of 99 percent silver, and 1 percent other metal. If the letters on the clasp read STER, then the piece is sterling silver usually 92.5 percent 7.5 percent other metals.