Hello Andy. All what you say is correct. These are young tech friendly guys mostly working for gem traders in Pakistan and are not the Sellers in their own right. They generally aim to sell to small single stone buyers. As of yet, I have not heard serious complaints about any malpractices except of course the high price and sometimes a slight difference in video/picture quality as compared to the real stone delivered. I hope the above helps.
We have been in jewelry business for over 50 years, and have recently started a lapidary and export business. We are looking for volume buyers. For the time being, we are focusing on Emeralds, Rubies, Sapphires and Peridots. But can do Tourmaline subject to a decent size order/demand. Let me know if you have an interest.