This adds 7 new magical gems to the game!
The gems are craftable using diamonds and netherite scraps. (I also added a recipe for diamonds and netherite scraps bc I can't be bothered with mining for these.)
Fire gem:
Shoot fireballs, get strength and set mobs on fire!
Lightning gem:
Summon harmless lightnings, smite mobs and players and get speeeeeed!
Ice gem:
Freeze other mobs! (Warning: The ice blocks replace other blocks)
Wind gem:
Get slow falling and short extreme speed boosts.
Life gem:
Get absorption.
Ender gem:
Get invisible and teleport!
Light gem:
Glow, see in the dark and place torches!
Creeper gem:
Explode without taking (explosion) damage! (You still get fall damage though)
Update 2.1:
Netherite-helmet enchantment "Omnipotence" was added. It can only be obtained from the enchanting table. It makes you glow and emit particles. If you have all types of crystal in your inventory, it gives you two extra abilities. One is activated via the . button, but you have to find the other one out yourself ;)