posted by NeedHelpPlz .
I've been stuck on this question for half hour so please help me
According to the principle of supply and demand, the price you pay for a product is determined both by its availability and by consumer demand for the product.
on the basis of this principle, which minerals do you think have a higher value, iron-containing minerals or feldspars? Explain you resoning.
i really need your help
You need to look in your text or on the web, determine the quantity of feldspars available and what they are used for. You probably have an idea about iron containing minerals. Then you will know how to answer the question. Here is a start.