Uncommon appearance of common minerals or I wish Mn would be more abundand element.

Mn-rich andalusite ("viridine"):

The black bar on the right equals 500um. Two pictures represent 90-degree-rotation of a microscope stage.

 Mn-rich epidote ("piemontite"):

These Mn-rich metamorphic rocks were found in Australia by Dr. Alfredo Camacho, who kindy let me take and post the pictures.
More pictures:

Large poikiloblasts of andalusite.

The usage of quartz wedge. Before and after, respectively. Length slow, which is expected in Mn-rich andalusites.

Pretty Mn-rich epidote. Two pictures represent 90-degree-rotation of a microscope stage.