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Mineralpedia Details for Moraesite

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Moraesite

Moraesite

Named to honor Brazilian mineralogist and geologist Dr. Luciano Jacques de Moraes. Moraesite is a rare mineral that occurs as a “late-stage hydrothermal mineral in complex zoned pegmatites.” It occurs in localities including Brazil, the United States, France, Finland, Russia, and Australia among just a  couple others. Moraesite occurs in association with beryl, beryllionite, hydroxylherderite, frondelite, triphylite, apatite, and muscovite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/moraesite.pdf

Formula
Be2PO4(OH)·4H2
Crystal System
Monoclinic 
Crystal Habit
Spherical, Druse, Encrustations 
Cleavage
Perfect, None, None 
Color
white 
Streak
white 
Class
Monoclinic 
Hardness
WebMineral
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Mindat
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Moraesite from Galiléia, Doce Valley, Minas Gerais, Brazil

Moraesite
            from Galiléia, Doce Valley, Minas Gerais, Brazil Snow white, fine bladed radial sprays to 1mm.
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Moraesite from Pomarolli mine, Linopolis, Divino das Laranjereiras, Minas Gerais, Brazil

Moraesite
            from Pomarolli mine, Linopolis, Divino das Laranjereiras, Minas Gerais, Brazil

White bladed radial sprays.

White, soft, pervasive alteraration and replacement of Beryl.

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Moraesite from Pomarolli mine, Linopolis, Divino das Laranjereiras, Minas Gerais, Brazil

Moraesite
            from Pomarolli mine, Linopolis, Divino das Laranjereiras, Minas Gerais, Brazil

Snow white sprays to 1mm covering alteration face of Beryllonite with associated Leucophosphite.

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Moraesite from Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil

Moraesite
            from Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil
Special Info
Type Locality

Type locality snow white fibrous crystals on Quartz.

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Moraesite from Itinga, Minas Gerais, Brazil

Moraesite
            from Itinga, Minas Gerais, Brazil

A very light weight mass of white, acicular bundles of crystals. Itinga is a pegmatite district, and the exact locality of this specimen is not known,

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