A stunningly beautiful example of creedite on saturated green/purple fluorite. Creedite from Mexico is not rare, in fact it is a staple of many wholesalers. Combinations like this however, are few and far between.  In fact, in all the time I have been doing this, this is only the 3rd such example I have had, and 4th I have seen (meaning, a piece with this sort of proportion.) Usually, the creedite is just a single matrixless ball. If you are lucky, there will be small bits of fluorite clinging to that cluster that provide some color contrast-- but this balance and proportion between the two species is truly rare.