So sentient biocrystal.
I plan on there being two varieties: pure biocrystal sentients, and integrated biocrystal sentients. The latter of these two varieties would be far more common, if only because most biocrystal creatures wouldn’t need to move around much and thus would be better categorized as plants, and because the cerulite networks necessary to create sentience would be far more complicated than the biological neural networks necessary.
Pure biocrystal sentients (purists) would only really exist in environments where the nutrients necessary to persist and produce offspring were hard to come by. And seeing as biocrystal creatures feed off of sand and rocks, I can’t imagine many places where such creatures would exist. Perhaps in the depths of the ocean, or in particularly dense vegetation. Though, given biocrystal is supposed to also be able to somewhat feed off of organic matter, they might not even appear in some of these areas.
These purists would be composed primarily of large portions of rosete, and probably they would be generally snake-like in form, or perhaps even lizard-like.
Integrated biocrystal sentients (integrationists) would be far more common, and probably far more interesting. After all, technically these would be composite beings, a symbiotic relationship in a single form; the host would have to find some way to pass on the biocrystal symbiotes on to their children.
Probably all animal kingdoms would contain integrationists, though my primary conception of such creatures are generally reptilian — or more accurately, dinosaurish.
I imagine kinds of stegasaurs or dimetrodons with white albate sails along their spine, or large tortoises covered in black melanite, possibly pattered with albate as well.
I could probably come up with some other kinds of these creatures, but it’s getting late and I have to save *something* for my next post(s).
Questions? Want more details? Comment! Maybe I’ll come up with some answers or something cool in this system!