Over this sample, several areas are visible: they are completely covered by small shiny sturmanite crystals with a dark yellow-green color.
Sturmanite is an uncommon sulphate, that in the world was find only in some localities of the South Africa and in one of the Russia.
Pictures and video are a little overlightened to show the details: the real colors are darker.
 Specimen weight:600 gr.
 Crystal size:mm. 2
 Overall size: 72mm x 72 mm x 57 mm
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