0FAYALITE (Magnesium Iron Silicate)
0FEDORITE (Hydrated Sodium Potassium Calcium Silicate Fluoride Chloride Hydroxide)
*FELDSPAR (Group)
0FERBERITE (Iron Tungstate)
0FERRO-EDENITE (Sodium Calcium Iron Magnesium Aluminum Silicate Hydroxide)
0FERROGLAUCOPHANE (Sodium Iron Magnesium Aluminum Silicate Hydroxide)
0FIEDLERITE (Lead Chloride Fluoride Hydroxide)
0FLINT (variety of Quartz - Silicon Oxide)
0FLUORAPATITE (the fluorine rich apatite)
Sale! 10FLUORITE (Calcium Fluoride)
0FLUORRICHTERITE (Sodium Calcium Magnesium Iron Silicate Hydroxide Fluoride)
0FORSTERITE (Iron Magnesium Silicate)
0FRANCKEITE (Lead Tin Iron Antimony Sulfide)
0FRANKLINITE (Zinc Manganese Iron Oxide)
0FUCHSITE (the chromium-rich muscovite)
0FULGARITE (lightning created Lechatelierite, Silicon Dioxide)