You do own taxes if you find a diamond. You don't owe taxes if you buy a rock for $10 and it increases in value to $50m. If you want to keep something you find

You do own taxes if you find a diamond. You don't owe taxes if you buy a rock for $10 and it increases in value to $50m. If you want to keep something you find and can't afford to because of taxes, you either get a loan or have to sell it.