Ice crystals whose form depends on temperature and humidity; they fall separately or in agglomerations of flakes.
Short translucent ice crystal with flat extremities; it is prism-shaped and occasionally hollow.
Ice crystal in the form of a thin hexagonal plate that is occasionally hollow.
Ice crystal characterized by complex branches similar to those of a tree.
Ice crystal with no defined shape resulting from the agglomeration of several crystals.
Star-shaped crystal with six branches.
Opaque ice crystal less than 0.2 in in diameter that froze inside a cloud.
Ice crystal less than 0.2 in in diameter that results from rain drops or snow flakes freezing before they touch the ground.
Hard, usually spherical ice crystal that varies between 0.2 and 2 in in diameter; it is formed of concentric layers of clear opaque ice.
Ice crystal that is identical to the column, except for the thin hexagon-shaped cap at each extremity.
Translucent prism-shaped ice crystal; it is long and narrow and has pointed ends.