of good quality is known from ore veins. Many quartz
crystals contain abundant inclusions of older metallic mineral up to several millimeters across: sphalerite (black or orange, fluorescent in UV), galena (lead gray, sometimes elongated grains), chalcopyrite, covellite (strong blue tarnish) and yellow native sulfur.
Ref: J.Hyrsl (2012) Gemstones of Peru, pp. 87, 91
Gem list contains entries from all listed localities in region.
Localities in this Region