Does placing your large hand on your square jaw help you come up with these inane thoughts?  Yes, gypsum is used in Sheetrock (an also tofu, for that matter…) but it’s not mined in crystalline form, but rather found in sedimentary rock formations…

Your knowledge of the commercial world is fairly wanting Mr. Trail, but then you’ve never really had to pay for the roof over your own head… a living off expense account and the largess of your father in law has left you wholly unaware of what it takes to turn a profit…