M.J. Hibbard
Lazulite


Lazulite   (Mg,Fe)Al2(PO4)2(OH)2    Monoclinic
o Hydrothermal stage in granitic pegmatite environment. (chapter 11)
- Crystal left of center is elongate in crystallographic c direction, whereas crystal just se of center is view down crystallographic c. Both crystals are pseudo-tetragonal, with the {111} and { 11} prisms mimicking the tetragonal dipyramid. Note spotty bluish and brownish coloration, the latter due to surface oxidation that has generated Fe-oxyhydroxides.

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