Color: braun, braun, rose, gelb, bräunlich
Streak color: hellrosa
Lustre: Glasglanz, matt
Diaphaneity (Transparency): durchscheinend
Tenacity: spröde References: Pekov, I.V. et al. (2002): Karupmollerite-Ca, (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4.7H2O, a new mineral of the labuntsovite group from the Ilimaussaq alkaline complex, South Greenland, Neues Jahrbuch für Mineralogie, Monatshefte, Vol. 10, 433-444
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