Apophyllite-(KF) or fluorapophyllite is a mineral of the apophyllite group, with the chemical formula of KCa4Si8O20(F,OH)·8(H2O).

It gets the first half of its name, "fluor", from containing more fluorine than hydroxide compared to the other minerals in the apophyllite group.

This mineral belongs to the uniaxial (+) optical class, which means its indicatrix has a prolate sphenoid shape with a circular section, principal section, and one optic axis.

It is popular among many mineral collectors because of the large, well-developed crystals they form and the multiple colors they come in.

The most wanted variation of fluorapophyllite is the green colored variant, which is found in India.