A very well crystalized example of ludlamte, from Huanuni.  While good examples are known from Idaho, Trepca, and Santa Eualia, the Huanuni mine is generally considered to have produced the best examples of the species.  This piece has exceptionally large, deep green crystals scattered on a siderite matrix.  There are a couple spots of damage, but this still remains an exceptional example of the species-- you rarely see crystals over 1.5 cm, and even those tend to be thin, narrow little pointy things.