Wow, nutso. I've seen more of that kind of stuff lately. MDMA is very difficult to get large crystals out of (past a certain point..) when crystallizing due to the fact that it is a racemic mixture. Even when using dual solvents and a very slow crystal induction phase (warm to slow over hours or days) one is challenged to get above a few hundred milligrams. But I have seen a bit of this kind of stuff, where it is not a "true" crystal per se, but fused via heat and then cracked. Seems to be a current marketing trend, which is no surprise considering how cut powder gets as it goes down the line. It is nice and pretty, and protects the purity from aggressive middlemen, but it also allows for less than optimal stuff to be "crystallized" into big quartzy chunks, much like a lot of that brown "moon rock" stuff going around. Still more than sufficiently pure however, just a little misleading sometimes.
Thanks for sharing the picture, quite beautiful.
Cheers