rekuwi,
beautiful shots!
Did you crystalize the cooper sulphate yourself?. I crystalize this substance usually in my classroom activities from water solutions in different circunstances (temperature, concentration..) and each time I obtain the typical monoclinic cristals, never spiral forms like yours.
this spiral crystal was rare, most of the others where those You have seen. I crystalize the copper sulfate with water and dryed on a warm place (not hot!).