This is a fine example of the rare Antimony Oxide, Valentinite (Pronounced: Vah-LEN-tin-ite). The piece features sharp, fine quality, prismatic crystals of Valentinite sitting atop massive Galena. This specimen was mined 6 years ago, and I have not seen any more specimens from this mine since that time. Here's a great chance to have a matrix specimen of a very hard to find mineral. Species collectors out there should jump on this one. 2.0 x 1.6 x 1.1cm