LAZULITE MgAl2(PO4)2(OH)2 Monoclinic

Description: Lazulite is a rare bright blue mineral which can occur aluminum-bearing quartzites, quartz veins or granite pegmatites.

SAUK COUNTY: Olsen (1962) reports a 2 mm thick vein of lazulite cutting through a block of Baraboo quartzite found on a talus slope above Devil's Lake in Sec. 30 T.11N R.7E, about 10 km. south of Baraboo. Analysis of the lazulite showed that it also contained significant nickel and cobalt.

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