Tanzania

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Almandine-Pyrope Series (Var: Umbalite)
	Umba River (Umba Valley), Tanga Region, Tanzania Specimen measures 1.1cm x .84cm x .5cm
© Jasun McAvoy	Photo ID: 157318 View Count: 203
Aluminotschermakite : ☐[Ca₂][Mg₃Al₂][(OH)₂\|Al₂Si₆O₂₂]
	Longido, Mt Kilimanjaro, Kilimanjaro Region, Tanzania Width of field is 2.5 mm. Collection of Jesse Crawford. The depth of field has been enhanced using Helicon Focus (10 exposures). Equipment: Nikon D-100 digital camera on a homemade microscope.
© 2008 Jesse Crawford	Photo ID: 178133 View Count: 132
Aluminotschermakite : ☐[Ca₂][Mg₃Al₂][(OH)₂\|Al₂Si₆O₂₂], Zoisite : {Ca₂}{Al₃}[O\|OH\|SiO₄\|Si₂O₇]
	Longido, Mt Kilimanjaro, Kilimanjaro Region, Tanzania Black crystalline aluminotschermakite in coursely grained green zoisite. 4.0 cm field of view, vertical. S276-035 Excalibur Mineral specimen.
© 2008, JGW	Photo ID: 154407 View Count: 213
Apatite-(CaF) : Ca₅[F\|(PO₄)₃]
	D-Block Mine, Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania Apatite (CaF). Vasco Trancoso collection and photo. From Karo Mine (extension off Block D),800 foot level. Crystal size: 2.2 x 0.9 x 0.9 cm. Gem quality blue Apatite sharp crystal with superb pyramidal termination. Featured in Min Record September/October 2009 issue. Please see child photos.
© vasco trancoso	Photo ID: 255622 View Count: 42
Apophyllite-(KF) : KCa₄[(F,OH)\|Si₈O₂₀] · 8H₂O
	Mt. Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania FOV=3.5 mm. Photo by Stephan Wolfsried; analysis by Guenter Blass (by EDS: 63.8% Si, 6.9% K, 29.2% Ca). Sample collected by Hans Eugster. This photo is of a mass of apophyllite inside a vesicle in a strongly peralkaline nephelinite lava, collected shortly after an explosive eruption in 1966. This sample formed part of a suite of specimens ...
© Stephan Wolfsried	Photo ID: 234295 View Count: 22
Augite : (Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆]
	Arusha Region, Tanzania Twinned crystals of lustrous black augite. The specimen is doubly-terminated with no point of attachment - a floater. Minor nick on one edge. Ex. A. Stevenson collection #139. Overall size of mineral specimen: 10x6x5 mm. Size of individual crystals: 10 mm.
© 2001 John H. Betts	Photo ID: 1719 View Count: 2102
Axinite-(Mg) : Ca₂MgAl₂[OH\|BSi₄O₁₅]
	Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania A nice crystal with tsavorite attached 22x12mm
© MAWINGU GEMS	Photo ID: 175969 View Count: 232
Axinite-(Mg) : Ca₂MgAl₂[OH\|BSi₄O₁₅]
	Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania size:2x1,5cm. type -loc rarer than u think ! Paul Bongaerts specimen and photograph
© Paul Bongaerts	Photo ID: 26550 View Count: 731
Axinite-(Mg) : Ca₂MgAl₂[OH\|BSi₄O₁₅]
	Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania size:3x4,5cm. type-loc. rarer than u think ! Paul Bongaerts specimen and photograph.
© Paul Bongaerts	Photo ID: 67230 View Count: 253
Axinite-(Mg) : Ca₂MgAl₂[OH\|BSi₄O₁₅]
	Merelani Hills (Mererani), Lelatema Mts, Arusha Region, Tanzania The biggest specimen, attached with calcite and tanzanite.2 rehealed pieces joined together. 190x110mm, 499gr.
© MAWINGU GEMS	Photo ID: 175968 View Count: 187