Just a guess, ametrine? Can’t really tell from the photo and you can’t be sure unless it is tested by a gemologist.
Not too sure either, still working it. It came from the center of a much larger stone. Im still working on it and have been for about a year. It seems to move internally as I work it.
Do a specific gravity test and a hardness test on it and that should give you some idea of what it is. The instructions for the SG test should be here somewhere in an ID thread. I have posted them.
Some type of Amethyst in Quartz. Could be Ametrine, but natural Ametrine is pretty rare. Amethyst and Ametrine are both Quartzes so specific gravity and hardness would be the same as for other Quartzes.