kroehnkite
noun
kroehn·kite
variants or kröhnkite
ˈkreŋˌkīt
plural -s
: a mineral Na2Cu(SO4)2.2H2O consisting of an azure-blue hydrous copper sodium sulfate that occurs massive
Word History
Etymology
modification of Spanish krönnkite, from B. Kröhnke, 19th century German mineralogist + Spanish -ite