Dumortierite In Quartz + Dude Rocks Card

The Dumortierite in Quartz comes with a Dude Rocks informational card for your son to learn more about the rock. Here is what it says:

Quartz is one of the most abundant minerals on Earth. The inclusions of dumortierite (the blue color) happen when aluminum is present during the formation of the quartz. Dumortierite is prized in the jewelry industry but also has other industrial applications (i.e. making of ceramics, heat resistant materials and abrasives). It was first discovered in France, but it can also be found in the US, Madagascar and Brazil.