Magical Gems BETA - Looking for a lot of feedback!

I've just released my latest and biggest Mod yet - Magical Gems! The Mod has a lot of complicated tools, swords, armor and blocks, and I'm pretty sure some are too unbalanced. Could you guys help me and give me feedback on my Mod? Any balance changes I should make? Any ideas for new special abilities? Please, share your feedback and suggestions in the comments below! If you have some time, you could even try out the Mod itself to see things for yourself instead of just reading about the features on the link above!