My parents' birthday is coming, and I want to buy them a silver jewelry in Taobao, just because outsiders don't know the truth and are afraid of jokes. Please ask the teacher to teach me, and it is be

My parents' birthday is coming, and I want to buy them a silver jewelry in Taobao, just because outsiders don't know the truth and are afraid of jokes. Please ask the teacher to teach me, and it is better to experience it personally. .. Look at purity: the higher the purity, the whiter the silver, and the jewelry surface looks even, shiny and polished. If it contains lead, the jewelry will appear bluish gray; If it contains copper, the surface of jewelry will be rough and the color will not be moist. Look true or false: it looks white, shiny and delicate, and it is a high-quality silver jewelry; Most of the color difference and dullness are fake silver ornaments. (Be careful when inserting things online)