[Krystyna]

   
Orpiment
Locality: Cut 62, Twin Creeks Mine, Potosi District, Humboldt County, Nevada, USA (Locality at mindat.org)
Size: 7.0 x 5.9 x 4.5 cm.
An aesthetic and rich cluster of extremely lustrous, golden-orange, gemmy orpiment crystals with chisel terminations on a 3-dimensional matrix from the 2001 find at the Twin Creeks Gold Mine of Nevada. 
This gorgeous piece is from Cut 62 of the mine, one of the major producing areas.
https://commons.wikimedia.org/wiki/File:...222518.jpg