Kogu's crafting idea 16 Amulets

Theese are amulets...

There are two versions, Crystal (diamond) and Emerald. They are used/equipped by putting it in the chestplate section of armors, a immediate downside to this is that you cannot have a chestplate and a amulet at the same time.

Crystal version can be enchanted with combat related enchantments like:
Health Regeneration, slow to fast depending on strength of enchantment.
More damage, anything does one to three hearts extra damage (including fists).
Resistance to damage form fire, projectile, exlosion, or overall damage.

The emerald version can be enchanted with movement related enchantments like:
Speed (pretty obvious)
Jump height (also obvious)
Faster swinging/punching (can swing any tool or sword faster and can pull up a bow faster)