Well, this comes down to where the quartz is assembled. You have to remember that in the USA people get paid 10X-20X more than people in say China. This makes goods produced in the USA cost 10x-20x more.
Remember companies do not send jobs overseas, the consumer sends jobs overseas when we vote with our $$$$. The companies that are losing to the cheaper products are forced to do the same to stay in business. Companies only try to give you what you want.