tsingtauite

== English == === Etymology === From Tsingtau (“Qingdao”) +‎ -ite. === Noun === tsingtauite (uncountable) (mineralogy) A porphyritic granite with phenocrysts of orthoclase in a fine-grained groundmass of quartz and alkali feldspar having an evenly granular fabric. ==== References ==== 1909, J. P. Iddings, Igneous Rocks: Composition, Texture and Classification, Description and Occurrence (page 58)