Gemstones and noble metals have always had a fascinating impact on human kind since thousands of years ago. We lied, betrayed, murdered and fought wars for the possession of it and nothing has really changed nowadays.
Something else has never changed down to the present day : All that glitters is not gold.
Precious Items will never be safe of forgers, since a lot of people are trying to earn instant riches out of it.
Jewelry and gemstone are an easy target for forgers because you’ll need some specialized knowledge and some sort of practice to detect the difference.