Mineralpedia Details for Bayldonite
Bayldonite
An uncommon mineral named for the original collector of the first specimens, English physician John Bayldon. It is a rare to uncommon mineral that can be found in localities in England, France, Ireland, Namibia, Kazakhstan, Australia, and the United States, among a few others. Bayldonite occurs as a secondary mineral in oxidized polymetallic deposits. Associated minerals include mimetite, olivenite, azurite, malachite, tsumebite, cuprian adamite, duftite, keyite, schultenite, philipsbornite, beudantite, alglesite, cerussite, and baryte.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/bayldonite.pdf
- Formula
- Cu3PbO(AsO3OH)2(OH)2
- Crystal System
- Monoclinic
- Crystal Habit
- Encrustations, Mammillary, Druse
- Cleavage
- None, None, None
- Luster
- Greasy (Oily)
- Color
- grass green, yellow green, dark green
- Streak
- green
- Class
- Monoclinic - Prismatic
- Fracture
- Uneven
- Hardness
- 4.5
- WebMineral
- View Bayldonite
- Mindat
- View Bayldonite
Bayldonite from San Rafael mine, Nye Co., Nevada, United States
Apple to dark green crust and individual bead-like crystals covering most of crust and associated with 1mm, light yellow, thin tabular Wulfenite crystals. Identified by Dr. Bill Wise several years ago in the "copper adit" of the 350 level and recently confirmed again by microprobe analysis.
Bayldonite from Tsumeb mine, Tsumeb, Namibia
- Special Info
- Raman
Bluish-green stubby Bayldonite crystals to about 1mm with tiny bright green Duftite crystals. T
Bayldonite from Kintore Opencut, Broken Hill, New South Wales, Australia
Bright lime green spherulitic crystals of Bayldonite.
