1 mark. Silver gold ornaments should normally be marked with silver imprint of the abbreviation ("S" or "Sterling"). The imprint of the scale silver S925. Fine silver imprint S990. But there are many countries in the silver goldsmiths print in mind.
2 color. Silver gold ornaments mostly silver-white microstrip yellow, was soft metal haoguang. Easily oxidized, over time, the color becomes dark yellow-white.
3 weigh heavy. The silver density of 10.53 g / cc. Platinum, gold, to hand weigh no fall feel. Needle scratches can also bend. This essentials and platinum main, K platinum or the imitation silver Deutsche Bank goldsmiths distinguish.
4 acid test. The silver case of any acids urban discoloration, resulting in dissolution. If a drop of concentrated hydrochloric acid, the inside of the silver jewelery will immediately generate white moss-like precipitation of silver chloride. And other precious metals does not have this phenomenon.
5 rhyme. Scale silver and goldsmith after landing sound boring, do not bounce, not rolling. |
