- F
-
- Face
- Facet
- Faceting
- Fault
- Feldspar
- Feldspar group
- Feldspathoid
- Feldspathoid group
- Felsic
- Ferromagnetic
- Ferromagnetism
- Ferrous
- Ferruginous
- Fiber
- Fibrous
- Filiform
- Fire
- Fishtail twin
- Fissile
- Fissility
- Flame test
- Flaky
- Flaw
- Flexibility
- Flexible
- Flexible and elastic
- Flexible but inelastic
- Floating crystal
- Flowstone
- Flow banding
- Fluoresce
- Fluorescence
- Fluorescent
- Fluorescent lamp
- Fluorite twin
- Fluvial
- Fluvial deposit
- Flux
- Fold
- Foliated
- Form
- Formula
- Fossil
- Fossiliferous
- Fossilize
- Fossilized
- Fossilization
- Fourling
- Fracture
- Framework silicates
- Freezing point
- Friable
- Fumarole
- Fusion