Claiming precious metals as a business expense and selling surplus at a loss

I own a business where buying precious metals (mostly gold) is a both a reasonable and necessary business expense. I'll usually buy a surplus and keep it in a safe. Let's say in a given year my business made $500K profit off $2M in revenue with physical gold being $100K of my business expenses. Now in the year I bought that gold the spot price went up but then started falling and I ended up selling half that gold for $49K or a $1K loss. What are the tax implications here and could I just place that $49K into my business account in the form of cash? I'll definitely consult with my CPA on this but wanted to see if I'm missing anything major here.