From : Zagradski Potok mine, Busovaca, Bosnia and Herzegovina
 
Hyalophane is a barium-containing silicate mineral belonging to the Fieldspar-group. It forms 
colourless translucent crystals up to 1 cm aggregated to a lustrous crystal-cluster even with twinned 
crystal structures. It was collected about 2008, now the mine is under water.
 
Dimensions : 1.2 x 1 x 0.7 cm