RE:RE:impurities....interesting. I didn't consider those impurities might be worth something. Just looking at Boron:
Global Boron Market Size was estimated at USD 2354.39 million in 2021 and is projected to reach USD 3099.97 million by 2028
... maybe there's even a market for them. Really couldn't care, but perhaps they do. Seems like more of a distraction.