About the five elements: I think stones are wealth. Since it is the wealth of the furniture industry, it can of course be placed, but it must be placed in the right place. Don't hold the feng shui level in the store. Generally, stones should be placed in places with heavy fires.
Another: stone, homophonic: time. Therefore, it means luck, and some strange stones are engraved with the words "Shi Yun", which means that luck has arrived.
I agree that jade belongs to gold, but stone belongs to gold. I really don't know if it is written in the Book of Changes. . .