:rolleyes: I have an older lady friend, that has had a ring for many years... with a diamond shape marking on the inside of it... & would like to know what the marking represents... Is it a brand or the amount of gold in it... Thanks... mjharlow

I believe that "hallmark" is what the mark is called. It could just be the representation of the person that made the ring.

I haven't found anything concerning a diamond shape yet. But, I will continue to look...

From the following website that you may find helpful:

Basic Hallmarks Identification

"...After 1838, a maker’s mark in a lozenge (diamond shape with four equal sides) was also required on French gold, silver and platinum. According to Tardy, the lozenge shape itself was introduced in 1797, but it is not clear if there were any regulations about its use at that time..."

Thanks for the helpful information, briolette!

... my pleasure!