Habit:> | b>Description: | Example: | | cicular | Needle-like, slender and/or tapered | Rutile in quartz |
| mygdaloidal | Almond-shaped | Heulandite |
| nhedral | Poorly formed, distorted | Olivine |
| laded | Blade-like, slender and flattened | Kyanite |
| otryoidal or globular | Grape-like, hemispherical masses | Smithsonite |
| olumnar | Similar to fibrous: Long, slender prisms often with parallel growth | Calcite |
| oxcomb | Aggregated flaky or tabular crystals closely spaced. | Barite |
| endritic or arborescent | Tree-like, branching in one or more direction from central point | Magnesite in opal |
| odecahedral | Dodecahedron, 12-sided | Garnet |
| rusy or encrustation | Aggregate of minute crystals coating a surface | Uvarovite |
| nantiomorphic | Mirror-image habit and optical characteristics; right- and left-handed crystals | Quartz |
| quant, stout, stubby or blocky | Squashed, pinnacoids dominant over prisms | Zircon |
| uhedral | Well-formed, undistorted | Spinel |
| ibrous or columnar | Extremely slender prisms | Tremolite |
| iliform or capillary | Hair-like or thread-like, extremely fine | Natrolite |
| oliated or micaceous | Layered structure, parting into thin sheets | Mica |
| ranular | Aggregates of anhedral crystals in matrix | Scheelite |
| emimorphic | Doubly terminated crystal with two differently shaped ends. | Hemimorphite |
| amillary | Breast-like: intersecting large rounded contours | Malachite |
| assive or compact | Shapeless, no distinctive external crystal shape | Serpentine |
| odular or tuberose | Deposit of roughly spherical form with irregular protuberances | Geodes |
| ctahedral | Octahedron, eight-sided (two pyramids base to base) | Magnetite |
| lumose | Fine, feather-like scales | Mottramite |
| rismatic | Elongate, prism-like: all crystal faces parallel to c-axis | Tourmaline |
| seudo-hexagonal | Ostensibly hexagonal due to cyclic twinning | Aragonite |
| seudomorphous | Occurring in the shape of another mineral through pseudomorphous replacement | Tiger's eye |
| adiating or divergent | Radiating outward from a central point | Pyrite suns |
| eniform or colloform | Similar to mamillary: intersecting kidney-shaped masses | Hematite |
| eticulated | Acicular crystals forming net-like intergrowths | Cerussite |
| osette | Platy, radiating rose-like aggregate | Gypsum |
| phenoid | Wedge-shaped | Sphene |
| talactitic | Forming as stalactites or stalagmites; cylindrical or cone-shaped | Rhodochrosite |
| tellate | Star-like, radiating | Pyrophyllite |
| triated/striations | Surface growth lines parallel or perpendicular to c-axis | Chrysoberyl |
| abular or lamellar | Flat, tablet-shaped, prominent pinnacoid | Ruby |
| heat sheaf | Aggregates resembling hand-reaped wheat sheaves | Zeolites |