The only dumb question is the one you don’t ask!
925 on silver is the numerical way to say Sterling. The 925
indicates 925 parts of silver per 1000 parts of finished product
weight. In other words, 92.5 % silver.
If you see the same numbering scheme on gold, it’s the gold
content of the finished piece. 417, 10K; 500, 12K; 584, 14K; 750,
18K; 917, 22K; 1000, 24K.
Generally the number system is used on items madde outside the