When doing a test on silver and the liquid turns blue and not red what is this telling me. I think the items are silver but not sure. I had bracelet that I was almost sure from Mexico and silver did the same thing. Is it different grades of silver or just a plain different metal all together. Anyone had this experience please give me a little guideance. I have been hunting for six months and cleaning out items not worth keeping and do not want to throw any silver or gold away.