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Braunite-I: Mn++Mn+++6SiO12 Braunite-II: Mn++Mn+++6SiO12
Comments: Crystals of braunite.
Location: Black Rock Mine, Kalahari Manganese Field, Northern Cape Province, South Africa.
Scale: Crystal size 1.3 cm.
© John Veevaert
Braunite-I: Mn++Mn+++6SiO12 Donpeacorite: (Mn,Mg)MgSi2O6
Comments: Brown crystalline massive donpeacorite with dark brown black braunite.
Location: Zinc Corporation of America Mine #4, Balmat, Saint Lawrence County, New York, USA.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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.
© Tom Loomis / Dakota Matrix