Ferberite Phosphophyllite A predominant

A predominant

and I encourage collectors to not overlook this piece as it’s one of the most interesting and important single Wavellites that I’ve seen from Bolivia

dark blue colored Vivianite crystal

and take my word for it

emerald green color

Ferberite Phosphophyllite A predominantAn impressive and attractive twinned Ferberite from Tasna. This species was sometimes previously referred to as "Wolframite", which was supposed to be an intermediary species between Ferberite and Hubnerite, but has since been discredited. This splendid piece is a sharp, highly lustrous, jet black twinned crystal of Ferberite (twinned along the a{100} face). For a final aesthetic touch, one can see a sparkling spherical aggregate of Marcasite on the