The 18k 756 is the hallmark for 18 carat gold although it should have an assay mark with it.
what does JC stand for on a Gold ring
Tweed Gold Coast Campus
An S inside a gold ring is the maker's stamp. If the ring were not gold and had an S inside it would stand for sterling silver.
Its gold filled not real
Heavy gold filled
It is the makers mark
What does 9CI stand for on a ring?
585 is an equivalent marking for 14k gold (real gold, not plated)
"K" doesn't stand for ring size, but the amount of gold in the ring.