P4SR is a mixture of metals that look like white gold or platinum without containing high amounts of either. P4 stands for Platina 4, a trademarked metal alloy created by Star Ring, Inc. Star Ring, or SR, created P4 as a low-priced alternative to high-quality white gold and platinum jewelry.2019-06-17
What does 925 SR mean on a ring?
sterling silver
What does P4SR mean on a silver ring?
of California trademarked Platina 4 as the name for this alloy mixture and chose P4 to stamp the ring shank. A P4 SR stamp on a ring represents Platina 4 made by Star Ring. The metal was created as a lower-price-point alternative to karat gold. The inventor claims it's hypoallergenic, easy to clean, and very durable.2015-01-12