Crystals used for firework recipes

With crystals being added into the game, a possible use for them would be in fireworks. Crystals could be used to create the effect of spear-like patterns shooting out when the firework bursts, besides the crossbow being able to shoot fireworks, not much has been done to fireworks in a long time, and i think crystals being used in firework recipes would give crystals more value as well as make players more exited about crafting complex fireworks within the game.