There was a small pocket that produced these Tetrahedrite specimens about 5 years ago, and they are some of the finest quality Tetrahedrite specimens that I have seen from Bolivia. This specimen features on predominant tetrahedron with very sharp faces and extremely highly luster sitting on matrix. The crystal itself has many small tetrahedral "hillocks" covering the faces of the crystal which make for a very unique "ripple" effect on all sides.