Pixel Art Tutorial - Gemstones

While I've made a few video tutorials on the basics of pixel art in the past (which have not aged well lol), I've never really tried making these kind of static tutorial images. So I thought I'd give it a try since they're pretty fun to make, and maybe some of you out there will find them useful. This is based off of my approach to pixel art, so it may not be be for everyone but then again few tutorials are rarely objective in what they teach.