Silver, Science, and Scripture

What is silver? What is it used for? How long has it been used? Will it have use in the future? There was an archaeological discovery that concluded that silver was used as a form of payment 3,700 years ago in the Levant (roughly the area of Israel, Lebanon, and Syria)--that was 500 years earlier than many thought it had been used there. Was silver shown to be used even a couple of centuries earlier than that by Abraham in the Bible? What is dross? Did ancient Rome have dross coins? Did the USA switch to dross coins instead of silver in 1965? Does the Bible teach against the use of dross? Does the Bible prophesy that silver will have value into the Great Tribulation? …