This is a good example of the rare antimony oxide, Valentinite. The piece features sharp, lustrous, translucent to gemmy whitish-grey colored, fine quality, tabular crystals of Valentinite measuring up to 10 mm (good size from this mine) on massive Galena. This specimen was mined 6 years ago, and I have not seen any more specimens from this mine since that time. This is one of the better pieces I've seen from this mine with a great coverage of fine quality crystals on a well balanced matrix. Ex. Brian Kosnar.