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snow crystals ![click to hear : snow crystals click to hear : snow crystals](../../../images/speaker-vert.gif)
Ice crystals whose form depends on temperature and humidity; they fall separately or in agglomerations of flakes.
column ![click to hear : column click to hear : column](../../../images/speaker-vert.gif)
Short translucent ice crystal with flat extremities; it is prism-shaped and occasionally hollow.
plate crystal ![click to hear : plate crystal click to hear : plate crystal](../../../images/speaker-vert.gif)
Ice crystal in the form of a thin hexagonal plate that is occasionally hollow.
spatial dendrite ![click to hear : spatial dendrite click to hear : spatial dendrite](../../../images/speaker-vert.gif)
Ice crystal characterized by complex branches similar to those of a tree.
irregular crystal ![click to hear : irregular crystal click to hear : irregular crystal](../../../images/speaker-vert.gif)
Ice crystal with no defined shape resulting from the agglomeration of several crystals.
stellar crystal ![click to hear : stellar crystal click to hear : stellar crystal](../../../images/speaker-vert.gif)
Star-shaped crystal with six branches.
snow pellet ![click to hear : snow pellet click to hear : snow pellet](../../../images/speaker-vert.gif)
Opaque ice crystal less than 5 mm in diameter that froze inside a cloud.
sleet ![click to hear : sleet click to hear : sleet](../../../images/speaker-vert.gif)
Ice crystal less than 5 mm in diameter that results from rain drops or snow flakes freezing before they touch the ground.
hail ![click to hear : hail click to hear : hail](../../../images/speaker-vert.gif)
Hard, usually spherical ice crystal that varies between 5 and 50 mm in diameter; it is formed of concentric layers of clear opaque ice.
capped column ![click to hear : capped column click to hear : capped column](../../../images/speaker-vert.gif)
Ice crystal that is identical to the column, except for the thin hexagon-shaped cap at each extremity.
needle ![click to hear : needle click to hear : needle](../../../images/speaker-vert.gif)
Translucent prism-shaped ice crystal; it is long and narrow and has pointed ends.