Villiaumite - NaF

Habit: Carmine-red, pink-red to light-orange, crystals rare, but can be cubic. Commonly granular or massive. Transparent, vitreous Luster.

Environment: In nepheline syenite and nepheline syenite Pegmatites.

Etymology: Honors Maxime Villaume, French explorer, in whose collection of rocks from Guinea the mineral was first found.

Although this mineral is beautiful to look at, it is extremely soft, and soluble in water so not a good mineral for jewellery.