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Single crystal habit
Free-standing
Floater
Granular, Granule
Tetragonal, Tetragon
Cubic, Cube
Rectanglar cuboidal, Rectangular cuboid
Rhombohedral, Rhombohedron
Octahedral, Octahedron
Regular dodecahedral, Regular dodecahedron, (Pyritehedron, Pyritehedral)
Rhombic dodecahedral, Rhombic dodecahedron
Deltoidal icositetrahedral, Deltoidal icositetrahedron, (Trapezohedral, Trapezohedron)
Pyramidal, Pyramid
Hexagonal pyramidal, Hexagonal pyramid
Bipyramidal, Bipyramid
Scalenohedral, Scalenohedron
Quadrangular bipyramidal, Quadrangular bipyramid
Hexagonal bipyramidal, Hexagonal bipyramid
Tabular, Table
Hexagonal tabular, Hexagonal table
Rectangular tabular, Rectangular table
Triangular tabular, Triangular table
Thick platy, Thick plate
Platy, Plate
Hexagonal platy, Hexagonal plate
Rectangular platy, Rectangular plate
Triangular platy, Triangular plate
Bladed, Blade
Discoidal, Discoid
Lathy, Lath
Nail-like, Nail
Micaceous, Mica-shape
Foliate, Foil
Scale, Scaly
Flake, Flaky
Film, Filmy
Prism, Prismatic
Stout prism, Stout prismatic
Stubby prism, Stubby prismatic, Short prism, Short prismatic
Long prism, Long prismatic
Hexagonal prism, Hexagonal prismatic
Quadrangular prism, Quadrangular prismatic
Triangular prism, Triangular prismatic
Slender prism, Slender prismatic
Needle, Acicular, Needle-like
Wire, Wirely
Filament, Filiform, Stringy
hairy, hair-like
Fiber, Fibrous
Groups of single crystals
Aggregate, Mass, Massive
Cluster(s), Group(s)
Spray(s), Radial, Radiating
Divergent
Stellate
Fan, Fan-like
Rosette
Bundle(s), Bunched
Wheat sheaf, Sheaf-like
Tuft, Tufty
Colums, Columnar
Lamellar, Foliated
Concentric zoing
Saccharoidal
Fish scale
Aggregates of crystals
Crust, Encrustations, Incrustations, Crust-like
Coat, Coating
Moss, Mossy
Mat, Matted
Druse, Drusy
Mass, Massive
Powder, Powdery
Pulverulent
Earth, Earthy
Cryptocrystalline
Globule, Globular, Sphere, Spherical, Spherulitic
Amygdaloid, Amygdaloidal
Mammillary
Stalactitic
Nodule, Nodular
Botryoid, Botryoidal
Reniform, Kidney-like
Oolitic
Framboid, Framboidal
Dendritic
Net, Network
Coral, Coralloid
Efflorescence, Efflorescent
Plumose, Plumosity
Others
Crude
Boxwork
Vug, Vuggy
Porous
Dissemination, Disseminated
Sporadic dissemination, Sporadically disseminated
Amorphous
Liquid