Pyrargyrite – Fresnillo, Zacatecas, Mexico
 Thumbnail showing a magnificent structure consisting of several pyrargyrite crystals. The flawless main crystal is covered with smaller crystals along its sides. All pyrargyrite crystals have a wonderful luster and display an intense blood-red color in transmitted light. The thicker the crystals, the less light penetrates.
 A rare large and aesthetically constructed thumbnail of this rarely offered mineral.