Botallackite
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Description
A secondary copper mineral first described at the Botallack mine in Cornwall England. Botallackite has a turquoise color and is composed of Cu2Cl(OH)3 It has a small monoclinic crystal system that is form on copper as a weathering process or with the exposure to salt water or pollutants. It has been found as a light blue-green patina on Egyptian archaeological bronzes (Scott 1990)
Resources and Citations
- David Scott, "Bronze Disease: A Review of Some Chemical Problems and the Role of Relative Humidity" JAIC, 29(2): 193-206, 1990.
- Wikipedia: Botallackite Accessed March 2025