yeah seems like calcium. if im not mistaken those are benign and can be removed. ive heard of problems from getting them removed because of infection. looks weird tho haha.
wow your very lucky. you both sides of the spectrum in those guys! ive always wanted a red and blue panther. the colors on panthers is so crazy, could you imagine seeing that in the wild.
haha i dont like to trim them, i kind of just let them go crazy. but just make sure you dont trim a lot, ive done that with ficus and it never grew the same again for some reason.
people at pet stores usually dont know what they are talking about. get all three, you would really need to eliminate the one with d3 if your cham was getting a LOT of sunlight. so them saying no d3 is the wrong idea in the first place.