Index No: NBM051320; Collected By: ; Sample Type: hand sample; Notes: Silicified rhyolite tuff, laced with clear quartz veinlets up to 1-inch thick; pyrite, quartz crystals drusy on fracture surfaces, stockwork quartz veining, some hematite/limonite-after-pyrite casts up to 1/2-inch across, amber jarosite coatings