Specimens Bayldonite is another attractive arsenate mineral formed in the oxidation zone of ore deposits. It has a nice green color and high resinous luster. The color is mostly due to the copper content and the luster is mostly due to the lead content.
Many specimens contain some zinc as well.
Bayldonite, which was discovered at Penberthy Croft Mine in Cornwall, England, can be used to make attractive cabochons, but is also nice as cabinet specimens. Specimens are known from only a few localities, so treasure any that can be found. Color is green to yellow-green or yellow. Luster is resinous. Crystals are transparent to translucent.