Bullion dealers and pawn shop owners require appropriate tools to ensure they are providing their customers with pure gold, silver, and other precious metals. Several analytical methods are used to ...

A material’s hardness relates to its mechanical resistance when subjected to mechanical indentation by another harder body. Diamond is considered the hardest natural material and is typically used for ...

Selling gold and precious metals can be a highly lucrative endeavor if done right. In fact, it's a $182 billion industry that's expected to grow a whopping 9% per year until 2027. But far too often, I ...