What is the marking on a ring to say it's platinum?

Answer:
The ring should be marked "pt" or "plat" and have the amount of platinum in the ring, such as "850 pt."

THE MARKING IS "PLAT." WITHOUT QUOTES

First answer by Auntiemom. Last edit by Auntiemom. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 4 [recommend question].