Simple: Is it part of the BEL complex?

I've seen the Mocha combos on WOB, and it's confusing. When paired with Mystic is seems to be BEL. When paired with Phantom [which...isn't it allelic with Mystic?], it looked more along the lines of Opal Diamond.

I'm just confused with the genetics of it all. One day I'll get it right. Today isn't that day.

HALP