When tribesmen in Tanzania first presented violet crystals to trader Manuel de Souza in 1967, he didn’t realize what they’d discovered was a new gemstone. Instead, he believed he was looking at unusually coloured sapphires.
The ‘advances’ in the business of altering gemstones are moving far more rapidly than our ability to detect and/or understand them. By the time knowledge of any specific treatment is widespread, there is often an ‘improved’ version of that technique or something totally different in the market.
Experience and keen perception are a must in the jewellery industry. Since the scale of the object is most often very small, this is a good place to start training the eyes to see things that can truly make a difference in value and price.