Ruby Weave Gem

(requires attunement by a spellcaster)
The gem has 3 charges and regains all expended charges daily at dawn. When you cast a spell while holding this gem, you can expend up to 3 charges to ignore the spell's material components (500 g per charge)
•Each long rest, choose a spell from any class list. The spell you choose must be of a level you can cast. You know that spell and can use your spell slots to cast it until your next long rest.