Mineralpedia Details for Talmessite
Named for its type locality and first noted locality at the Talmessi Mine in the Esfahan Province of Iran. This rare mineral occurs at just a handful of localities as a secondary mineral in the oxidized zone of hydrothermal mineral deposits as an alteration product of realgar, orpiment or copper-nickel arsenides.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/talmessite.pdf
Talmessite from Bou Azzer dist., Anti-Atlas, Morocco
Pink crystals to 3mm of cobaltoan Talmessite.