Q. Are quartz stones valuable?

Answer

Because of its transparency, the raw price of quartz is about $0.01 per carat, while its value as a gem ranges from $1 to $7 per carat. Pink, rose, and smokey quartz are all highly appreciated, although the price per carat may exceed $15. Most valuable are clear, well-formed quartz pieces with strong color saturation. It's possible that the value of the collection of quartz crystals is far more than you realize. On the other hand, it's possible that the collection doesn't have any value at all. Quartz in its natural state is not particularly precious; one carat of quartz will only fetch about one cent.