Crocoite

This mineral has a bright hyacinth-red color and an orange-yellow streak. It is commonly found as crystals, which are translucent with an adamantine luster. It is not abundant enough to be of commercial value, but it is of historic interest because the element chromium was first discovered in crocoite. Its name is from the Greek word meaning "saffron," in allusion to the color.

Mineral Photos courtesy of R.Weller/Cochise College