Probably a jewelers mark or brand. It is unlikely to be a measure of the metal.
Chat with our AI personalities
Oh, dude, 1ks on a diamond ring means there's a thousand small diamonds on it. It's like a blinged-out version of a regular diamond ring. So, if you're into that extra sparkle, that's the way to go.
PLAT engraved on the inside of the ring indicates that the ring is made of Platinum.
Sterling silver
Oh, dude, 10k corona engraved on a ring means it's made of 10 karat gold! Like, that's just the purity of the gold, you know? So, if you see that engraving, it's basically telling you what the ring is made of. Cool, right?
My ring has the same thing engraved on it so I decided to call the store where I bought it from to get my question answered. What the store said is "the 10K represents the purity of the rings metal and the sp is the manufactures initials. Sometimes they put their initials on the jewelry."