Mineralpedia Details for Parnauite
Named after John L. Parnau, an American mineral collector who helped contribute to the study of Parnauites type locality at Majuba Hill in Nevada, USA. Parnauite is a rare mineral that occurs in the United States, France, Germany, Slovakia, Ireland, England, Wales, and Namibia among just a couple others. It is a secondary mineral that occurs in oxidized, hydrothermal copper-tin deposits.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/parnauite.pdf
Parnauite from Majuba Hill mine, Pershing Co., Nevada, United States
Dark green, flattened prismatic crystals in semi-parallel to somewhat radial growth forming rosettes or balls to 0.75mm. Note the terminations are oblong - or distorted squares.
Deep, dark green ball-like aggregates to 2mm composed of thin, platy crystals.