Title
geminite
Composition
Cu2+(As5+O3OH).H2O
Crystal System
Triclinic
Status at Tsumeb
Confirmed
Abundance
Extremely rare
Distribution
Third oxidation zone.
Paragenesis
Supergene.
Type Locality
No
Entry Type
Species TSNB146
General Notes
Geminite is named as part of the davidlloydite (type specimen) assemblage, in the third oxidation zone, probably from 44 Level (Hawthorne et al. 2012).
A specimen of a calcioandyrobertsite-like mineral (originally identified as yvonite) in the collection of the late Mark Feinglos shows associated lindackerite and very pale green transparent crystals of geminite (confirmed by Tony Kampf; Mark Feinglos pers. comm. to M. Southwood October 2019). The specimen is now in the collections at Harvard University (MGMH 2022.4.6333).
Associated Minerals
calcioandyrobertsite; davidlloydite; fraipontite; lindackerite; stranskiite; yvonite (?); zincolivenite
