Dumortierite
Natural dumortierite's smooth blacks and metallic blues make it a bold edition to any collection or project. Known as the stone of intelligence, dumortierite is said to command order and bring forth critical thinking skills. This stone's lighter versions are often found mixed with various quartz to achieve the softer coloration.
Intrinsic Trading dumortierite is found in Madagascar, Namibia, Sri Lanka, Canada, Poland, France, Brazil, and United States.