Fluorite, also called fluorspar, is a mineral made up of calcium and fluoride or calcium fluoride. It can come in every single color on the color spectrum.  Its crystals are cubic shaped

Fluorite is a highly protective and stabilizing stone, useful for grounding and harmonizing spiritual energy. 

You will receive the exact specimen pictured. This piece is large, approximately 8" tall by 8" wide and has a nice flat, smooth surface.  It can stand on it's own (though would need to be in a secure, non shaking place to stay upright) and also lays nicely.