Some crystal elemental monsters I painted for a personal monster collection game thingy thing.
These are based on real crystals, from left to right: a type of quartz that looks like it has ice inclusions, an opal, aquamarine, fools gold, which sometimes form into very precise cube shapes and good old fashion basic vanilla quartz.
This game isn't even in a demo stage yet, but check out my previous games on my Steam and Itch:
https://store.steampowered.com/app/2887720/Human_Upgrade_Labs/
https://ultra-shenanigans.itch.io/