Chalcotrichite including Calcite    Onganja, S.W. Africa.  Ex Nancy Collins collection.  These nice calcites have extremely unusual surface growth features which may be difficult to see in the photographs.  Blood red (darker in person) inclusions add to the dramatics of this piece.  3.3 x 2.6 x 2 cm with the largest calcite being 2.7 cm.  No damage.  $135