Vin Russo had some brightly colored ball pythons that he was working with that he called his lemon balls? When breeding two of these together he produced a leucistic ball python that he called the white diamond. Most people that I hear talking about them now call hets from his line 'Het Russos' instead of Lemon balls.

I think he was one of the very first, if not THE first, to produce a leucistic ball python.