I have made over 50 trips to Mexico to buy minerals specimens, especially silver minerals like this one. It is very hard to get matrix pieces or association pieces like this one. Somehow this piece reminds me of a tank turret with quartz guns or maybe an alien robot with quartz arms. The pyrargyrite is very bright and shiny even though I brought this piece back from Mexico about 20 years ago. This piece measures 2.1 x 2.7 (including the arms) x 1.9 cm. It weighs about 14.7 grams.