The wispy feathers in this larger medium plus toned shield cut are hard to see (best from the pavilion) and do not effect the flash. The green is taken down a peg with a brown overtone in daylight, that is much less apparent in yellowish light. But if we are going to count pegs, this is a cuprian tourmaline and that does bring it up a peg in my book. I did not know this gemstone was copper bearing when I bought it and only discovered the fact with my spectrometer. I have no idea whether its copper content is actual making a significant contribution to the gemstones color. I does help make the shield cut unique in the collection.
The bottom line with this stone is a complex mixture of wispy feathers that are common in cuprian tourmaline, a fine tone level of medium plus with a nice yellow green color slight modified with a brown overtone. At 6.23 carats it is a fine sized for a shield cut.