Blocky or Equant – Roughly box-like or ball-like, as in pyrite.

Tabular - Shaped like a pad of paper (thin tabular) or a deck of playing cards (thick tabular).

Prismatic – Elongated with opposite faces parallel to one another, in which case they may be short and stout, or long and thin. Includes minerals such as quartz and tourmaline crystals

Bladed - Long thin crystals may be flattened like the blade of a knife.        Actinolite is often bladed.

Acicular – Needle-like.

Filiform or Capillary – Like hair or thread.

Druzy - Covering a surface in more-or-less outward pointing clusters of small crystals, such as druzy quartz crystals.

Divergent or Radiating - Growing outward from a point in sprays or starbursts, such as some hemimorphite exhibits.

Reticulated – Interconnected like a lattice or trellis, such as rutile.

Dendritic or Arborescent - Slender divergent branch- or fern-like clusters, such as some native silver crystals.

Columnar – Stout parallel clusters with a column-like appearance, such as some forms of the serpentine minerals.

Fibrous – Aggregates of parallel or radiating slender fibers, such as chrysotile.

Stellate – Long thin crystals radiating outwards in all directions, like a starburst or in a circular pattern, such as astrophyllite.

Spherical or Globular – Compact clusters radiating outwards forming rounded, ball-like, shapes.

Botryoidal – Globular or ball-like clusters – like a bunch of grapes.

Mammillary – Large rounded masses resembling human breasts.

Reniform – Radiating compact clusters of  crystals ending in rounded, kidney-like, surfaces, such as hematite often exhibits.

Foliated – Looking like overlapping flakes or leaves and easily separable into individual leaves or flakes, usually at least somewhat "wavy" in appearance, such as the chlorite minerals.

Micaceous – Like foliated, but splits into very thin sheets, like the mica minerals.

Lamellar – Flat, platy, grains thicker than flakes or leaves, but overlapping like foliated, such as molybdenite.

Plumose – Feather-like sprays of fine scales, similar to dendritic but with a much finer structure, such as one form of native silver.

Massive – No crystal structure visible, though the mineral may be crystalline.  Some massive minerals may also be granular.

Banded – Showing different bands or layers of  color or texture, as in  some agates or some fluorite.

Concentric – In rounded masses showing layers around the mass in shells, working outward from the center, as in some agates.

Oolitic – Masses of small round spheres about the size of fish eggs (0.25-2.0mm).

Pisolitic - Roughly pea-size rounded masses.

Concretionary – Masses formed by mineral being deposited around a nucleus, may be spherical or rounded but may also be a wide variety of other shapes.

Geode – A rock with a hollow, roughly spherical, interior with concentric bands of mineral (usually agate) on the wall and possibly crystals on the interior surface, pointing inwards.