Lazulite

minerals

rutile

kyanite

svanbergite

Images
Formula: MgAl2(PO4)2(OH)2
Anhydrous phosphate containing hydroxyl, lazulite group
Specific gravity: 3.122 to 3.24
Hardness: 5½ to 6
Streak: White
Colour: Blue, sky-blue, bluish white
Solubility: Slowly soluble in hot acids
Common impurities: Fe,Mn
Environments

Pegmatites
Sedimentary environments
Metamorphic environments

Lazulite occurs disseminated in quartzite, schist and quartz veins, in the border zones of complex granite pegmatites, and in sediments.
In metamorphic environments associated minerals include quartz, andalusite, rutile, kyanite, corundum, muscovite, pyrophyllite, dumortierite, wagnerite, svanbergite and berlinite.
In pegmatites associated minerals include albite, quartz, muscovite, tourmaline and beryl (HOM)

Localities

Near Werfen, St. Johann im Pongau District, Salzburg, Austria, lazulite occurs with wagnerite in quartz carbonate veins in clay slate (Dana).

Type Locality:ⓘ Freßnitzgraben, Krieglach, Bruck-Mürzzuschlag District, Styria, Austria, lazulite occurs associated with wagnerite (Mindat).

At the Cotamitos mine, Cerro de Potosí, Potosí City, Potosí Department, Bolivia, lazulite occurs as pseudomorphs with muscovite variety sericite after orthoclase (Dana).

At Datas, Minas Gerais, Brazil, lazulite occurs in quartz veins in sericitic quartzite with quartz, muscovite variety sericite and rutile (Dana, AM 35.1-18).

At Tribeč Mountain, Kovarce, Topoľčany, Nitra Region, Slovakia, lazulite occurs in quartz veins in quartzite (Dana).

At the Västanå Iron Mine, Näsum, Bromölla, Skåne County, Sweden, lazulite occurs with berlinite (Dana).

At Hålsjöberg, Torsby, Värmland County, Sweden, lazulite occurs with svanbergite (Dana).

At Markleeville, Alpine county, California, USA, lazulite occurs with andalusite and rutile in garnetiferous quartzite (Dana).

At Breyfogle Mine, Panamint Treasure claim group, Gold Hill, Gold Hill District, Carbonate District, Panamint Mts, Inyo county, California, USA, lazulite occurs in a quartz vein associated with quartz, muscovite and rutile (AM 35.1-18).

At Champion Mine (Black Eagle), White Mountain Peak, White Mountains, Mono county, California, USA, lazulite occurs in a quartz dike in schist, with andalusite, quartz, calcite and hematite (Dana, AM 35.1-18).

At Graves Mountain, Lincoln county, Georgia, USA, lazulite occurs in sericitic quartzite with quartz, kyanite, rutile, staurolite, garnet and pyrophyllite (Dana, AM 35.1-18).

At Clubb Mountain Kyanite Prospects, Lincolnton, Gaston county, North Carolina, USA, lazulite occurs in a quartz-kyanite vein in quartzite with quartz, kyanite, rutile, staurolite, garnet and pyrophyllite (AM 35.1-18).

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