“Sony Nex 7, bellows, Mitutoyo Plan Apo 20x, aperture, THK linear actor, stack shot control.
Hellyerite originally is blue. This one is already dehydratet and turned to green. See also http://www.mindat.org/mesg-7-145934.html
So more precisely this is an amorphous Zaratite-like alteration-product after Hellyerite.
Collection and Photo Stephan Wolfsried”
Stephan Wolfsried - 1st September 2015