Based on a specimen from Zacatecas, Mexico.

Most of the crystal models I make are chosen for the simple reason that I find the particular combination of crystal forms attractive. This little tennantite crystal is no exception, and as soon as I saw it under magnification I decided it needed a model that was easily visible to the naked eye. This one exhibits three crystal forms, a tristetrahedron, dodecahedron, and tetrahedron.