Macfallite Johnsenite-(Ce) Braunite-I Image

Macfallite Johnsenite-(Ce) Braunite-I Image
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 The Mineral News newsletter has expanded to sixteen (16) pages a month and it has added significant features such as frequent book reviews, photographs to supplement new mineral descriptions. Occasional color issues are produced as well.
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 Braunite-I, Macfallite, Johnsenite-(Ce)

Large Braunite-I Image

Mineral: Braunite-I: Mn++Mn+++6SiO12  
Macfallite: Ca2(Mn+++,Al)3(SiO4)(Si2O7)(OH)3  
Johnsenite-(Ce): Na12(Ce,REE,Sr)3Ca6Mn3Zr3W(Si25O73)(CO3)(OH,Cl)2
Comments: Tiny - less than 1mm - maroon crystals of mcfallite suspended as inclusions in massive quartz along with larger spots of brown johnsenite-(Ce) and braunite.
Location: Artur mine, Jaguaracu, Minas Gerais, Brazil.
Scale: Overall 3 x 2.5 slab.
Copyright: © Tom Loomis / Dakota Matrix
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