Ember crystals

Ember crystals would be a kind of orangish white crystal that generates only around lava sources.They can be grown by the player on any block touching lava.They drop ember crystal shards, and those can be crafted into embers.Embers stack up to 16, and when thrown, they explode into a small radius when they hit something, setting any entities on fire and dealing 4 damage, with slight knockback.They can also be loaded into a crossbow, which increases the ranged damage to 6, but the downside would be that since they only stack up to 16, reloading could be a hassle.

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