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Geraldo Alvim's Photo Gallery

9V4-V96Tourmaline : A(D3)G6(T6O18)(BO3)3X3Z, Albite : Na(AlSi3O8)

Coronel Murta, Minas Gerais, Brazil

Dimensions: 4.5 cm x 3 cm x 2.7 cm

Green Tourmaline on Albite, 4.5 x 3 x 2.7 cm. This piece was a good find; image very well done and with good color. Photographed by Geraldo Alvim.
Copyright: © Geraldo Alvim      Photo ID: 282848     Uploaded by: Geraldo Alvim   View Count: 194   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

KH3-6YYCassiterite : SnO2, Albite : Na(AlSi3O8)

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

Dimensions: 5.5 cm x 3 cm x 2.8 cm

Mineral collected by Geraldo Alvim. 5.5 x 3 x 2.8 cm. Photographed by Geraldo Alvim.
Copyright: © Geraldo Alvim      Photo ID: 282845     Uploaded by: Geraldo Alvim   View Count: 292   Approval status: Public galleries    Type: Photo - 768 x 1024 pixels (0.8 Mpix)

KFH-YH1Desert Rose

Samalayuca Desert, Mun. de Ahumada, Chihuahua, Mexico

Dimensions: 4 cm x 5 cm x 8 cm

Sample crystals 4x5x8cm. Geraldo Alvim
Copyright: © Geraldo Alvim      Photo ID: 232825     Uploaded by: Geraldo Alvim   View Count: 388   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

M3M-0N7Beryl (Var: Red Beryl) : Be3Al2Si6O18

Wah Wah Mts, Beaver Co., Utah, USA

A well developed, gemmy, 7 mm red beryl crystal perched in rhyolite matrix. Collection and photo: Geraldo Alvim
Copyright: © Geraldo Alvim      Photo ID: 232824     Uploaded by: Geraldo Alvim   View Count: 272   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

WQK-CD0Siderite : FeCO3, Dolomite : CaMg(CO3)2

Vicente Marinho quarry, Mantena, Minas Gerais, Brazil

Dimensions: 5 cm x 5 cm x 3 cm

Siderite crystal (dark) of 2.8 cm on Dolomite matrix. Overall size 5x5x3cm. Geraldo Alvim
Copyright: © Geraldo Alvim      Photo ID: 232823     Uploaded by: Geraldo Alvim   View Count: 262   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

42G-CXWCalcite : CaCO3

Rio Grande do Sul, Brazil

Dimensions: 8 cm x 5 cm x 4 cm

Calcite 8x5x4 cm. Photo & Collection Geraldo Alvim.
Copyright: © Geraldo Alvim      Photo ID: 158717     Uploaded by: Geraldo Alvim   View Count: 363   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

LWC-NGKCalcite : CaCO3

Pedreira do Vidro quarry, Moita do Poço, Turquel, Alcobaça, Leiria District, Portugal

Dimensions: 9 cm x 5 cm x 5 cm

Golden Calcite, doubly terminated. 9x5x5 cm. Geraldo Alvim Photo and Collection.
Copyright: © Geraldo Alvim      Photo ID: 158716     Uploaded by: Geraldo Alvim   View Count: 328   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

R26-923Chrysotile : Mg3(Si2O5)(OH)4

Gualba quarries, Gualba, Vallès Oriental, Barcelona, Catalonia, Spain

Green chrysotile. Size of specimen - 4 cm.
Copyright: © Geraldo Alvim      Photo ID: 158713     Uploaded by: Geraldo Alvim   View Count: 518   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

FU6-PLGAzurite : Cu3(CO3)2(OH)2, Malachite : Cu2(CO3)(OH)2

Seabra, Bahia, Brazil

Dimensions: 10 mm x 7 mm

Size: 10 x 7 x 3.5 cm

Collection and photo: Geraldo Alvim
Copyright: © Geraldo Alvim      Photo ID: 158712     Uploaded by: Geraldo Alvim   View Count: 387   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

QG5-2A8Nontronite : Na0.3Fe2((Si,Al)4O10)(OH)2·nH2O

Jaime Pacheco claim, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

Greenish, dusty nontronite aggregate and quartz.
Overall size:15x11x9cm. Geraldo Alvim collection and photo.
Copyright: © Geraldo Alvim      Photo ID: 158711     Uploaded by: Geraldo Alvim   View Count: 689   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)
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