Did Bella ever found out that the little puso that Edward gave her was actually a diamond?

Yes, she found out from alice

no, she found out from Jacob, when he noticed the little charm he sinabi "a rock" & that reminded her of what Alice wanted to say before Edward cut her of, she sinabi something about "what's one madami diamond? my point is, he already got one on..." then Bella ended the sentence sa pamamagitan ng adding "you" at the end, so what Alice wanted to say was; "What's one madami diamond? my point, is he alredy got one on ...you" çe ça

yup yup !!

you tell me i dont know either i think she found out from alice