What does gm 69 mean on a 10K gold necklace mean?

The "gm 69" marking on a 10K gold necklace indicates that the necklace weighs 69 grams. In this context, "gm" stands for grams, while "10K" refers to the gold's purity, meaning it contains 41.7% pure gold and is alloyed with other metals. This marking helps buyers understand the weight and value of the necklace based on its gold content.