So 1 quartz can output 2 quartz dusts, and finally become 2 quartzs, this created a recipe circulation and will be able to exploit it without much effort.

This recipe is intended for Dupe, so Dupe it.

When considering game balance, you need to consider the crafting difficulty of the machine used in that recipe and the difficulty of operating the machine.
Your point lacks consideration of when this recipe will be activated during survival play.