This is a green brochantite crystal cluster on a tan matrix for good contrast. Though most of the needles are fine, there are a few thinker ones mixed in. The overall dimensions are 3.2 cm wide by 3.9 tall and 2 cm front to back. The locality for this piece is Milpillas Mine, Cuitata, Municipio de Cananea, Sonora, Mexico. There are a few loose needles.