krohnkite

krohnkite

[′kreŋ‚kīt]
(mineralogy)
Na2Cu(SO4)2·2H2O An azure-blue monoclinic mineral composed of hydrous copper sodium sulfate, occurring in massive form.
References in periodicals archive ?
1764 Sideronatrite on Krohnkite, Chuquicamata, Chile, no.
Following the theme of the show, the Rice Northwest Museum of Rocks and Minerals had a very nice display of rarities like krohnkite, cylindrite, proustite, and more from the Andes region.