Tourmaline describes a group of silicate minerals with highly similar crystal structures but widely varied chemical compositions. The tourmaline stone is known for having one of the broadest color ranges of any gemstone family!

Some claim tourmaline is the national gemstone of the USA, though this isn’t officially confirmed. However, the US state of Maine named tourmaline their official state mineral in 1971 after the gorgeous tourmaline specimens found there.

So what makes tourmaline so diverse? And is tourmaline an expensive gem? We’ll answer all your burning questions in this tourmaline gemstone guide!