There was a small pocket that produced these Tetrahedrite specimens about 7 years ago (~2002), and they are some of the finest quality Tetrahedrite specimens that I have seen from Bolivia. This specimen features dozens of tetrahedrons with very sharp faces and extremely highly luster on matrix. The crystals (the largest measuring 1.2 cm across) have many small tetrahedral "hillocks" covering the faces which make for a very unique "ripple" effect on all sides.