Diamond Dust
From FIS Freestyle wiki

Diamond dust (ice needles, frost in the air, frost mist) A type of precipitation composed of slowly falling, very small, unbranched crystals of ice which often seem to float in the air. It may fall from a high cloud or from a cloudless sky. It usually occurs under frosty weather conditions (under very low air temperatures)Spindrift, Stratus and Diamond Dust Sundogs..... The Schattberg, Saalbach Austria. © Thomas Dossler.
Diamond dust (ice needles, frost in the air, frost mist) A type of precipitation composed of slowly falling, very small, unbranched crystals of ice which often seem to float in the air. It may fall from a high cloud or from a cloudless sky.
It usually occurs under frosty weather conditions (under very low air temperatures).
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