The photo can be used for commercial purposes.
This is 42MPx photo of icicle on the railing. At normal atmospheric pressure, the liquid water solidifies in ice at 0 ° C (273.15 K, 32 ° F). If the conditions are ideal they can create very interesting shapes.
The best for photographing such crystals are macro lenses or a conventional lens using so-called macro rings. These allow you to focus from a much closer distance and achieve extraordinary details in the resulting photo.