I just finished reading an email from about a year ago, from a cutter that runs a significant selling site on the internet. He said that people are looking for a reason not to buy gemstones now and he can not sell included stones. This is sad to me because a large percentage of beautiful tourmaline is included. So if you have to have gemstones that are internally perfect and graded like diamonds with a ten power loop, tourmaline is really not the gemstone for you. After years of cutting tourmaline, I have come to the accommodation that how distracting the flaws are, is more important than whether there are imperfections in the gemstone or not. This has let me venture into shades of color in tourmaline that I have not seen clean and the fun of accepting the challenge to get the best gemstone I can from less than perfect rough. The yeild in carats may not be good, but if you win a beauty threw careful cutting from lower grade material, it makes me smile.