Apophyllite (mineral)

Apophyllite crystals, a selection of specimens of this crystallized mineral species. Apophyllite is a mineral, and here you’ll find a number of collectibles with descriptions, photos and sometimes videos. These apophyllites are for sale.
This is the name of a mineralogical group comprising three different species: apophyllite-(KF), with chemical formula KCa4Si8O20(F,OH).8H2O, apophyllite-(KOH) and apophyllite-(NaF). They form continuous series. All are phyllosilicates, crystallizing in the tetragonal system.