Cerussite

 Though the Bunker Hill mine is globally famous for world-class pyromorphites, it also produced exceptional, glassy, and translucent cerussites—often via mid-20th-century pockets—featuring prismatic, bladed, or reticulated “jackstraw” twinning habits. This specimen is in extremely fine condition due to its relatively thick bladed structure. A rare find. Ex Mike Wortham

Locality: Bunker Hill Mine, Jersey Vein #9, Kellogg, Idaho

Composition: lead carbonate