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Petr Gadas' Photo Gallery

5XY-VJMChalcedony (Var: Agate)

Votrubec quarry, Semily District, Liberec Region, Czech Republic

Field of View: 200 mm

Photo ID: 943425     Uploaded by: Petr Gadas   View Count: 27   Approval status: Public galleries    Type: Photo - 682 x 396 pixels (0.3 Mpix)

JR1-R5JVránaite, Spodumene, Albite

Manjaka, Sahatany Valley, Ibity, Antsirabe II, Vakinankaratra, Madagascar

Field of View: 0.8 mm
Largest Crystal Size: 350 μm

Radial aggregate of accicular crystals of Vránaite up to 0.35 mm in spodumene-rich pegmatite. BSE image.
Photo ID: 756140     Uploaded by: Petr Gadas   View Count: 130   Approval status: Public galleries    Type: Photo - 1149 x 871 pixels (1.0 Mpix)

UE0-3VAVránaite, Spodumene, Albite, Rhodizite

Manjaka, Sahatany Valley, Ibity, Antsirabe II, Vakinankaratra, Madagascar

Field of View: 1 mm
Largest Crystal Size: 750 μm

Radial aggregate of accicular crystals of Vránaite up to 0.75 mm in spodumene-rich pegmatite. BSE image.
Photo ID: 756139     Uploaded by: Petr Gadas   View Count: 122   Approval status: Public galleries    Type: Photo - 1058 x 871 pixels (0.9 Mpix)

F3J-NUHHematite

Mirošov, Žďár nad Sázavou District, Vysočina Region, Czech Republic

Field of View: 5 cm
Largest Crystal Size: 30 mm

3 cm large rose-like intergrowths of tabular crystals in the pocket of an alpine-type vein. Collection and photo PG
Photo ID: 724225     Uploaded by: Petr Gadas   View Count: 119   Approval status: Public galleries    Type: Photo - 800 x 600 pixels (0.5 Mpix)

QXR-C82Diopside, Quartz, Grossular, Wollastonite, Calcite

Mirošov, Žďár nad Sázavou District, Vysočina Region, Czech Republic

Dimensions: 18 cm x 12 cm x 12 cm

Great example of zoned and folded skarn with well developed and sharply separated individual zones (see image).
Photo ID: 720683     Uploaded by: Petr Gadas   View Count: 212   Approval status: Public galleries    Type: Photo - 1954 x 1343 pixels (2.6 Mpix)

W3K-XTKQuartz, Albite

Gmina Strzegom, Świdnica Co., Lower Silesian Voivodeship, Poland

Dimensions: 11.5 cm x 7.8 cm x 4.7 cm

Texturally very interesting sample - polished section of drusy albite with euhedral crystal of quartz (var. smoky quartz) in cores which are overgrown by graphic intergrowth of quartz with albite.
Photo ID: 720656     Uploaded by: Petr Gadas   View Count: 99   Approval status: Public galleries    Type: Photo - 1600 x 1059 pixels (1.7 Mpix)

HFW-F0YBobfergusonite

Nancy pegmatite, Chacabuco Department, San Luis Province, Argentina

Dimensions: 13 cm x 10 cm x 6 cm
Largest Crystal Size: 75 mm

Monomineral aggregate composed of fresh tabular crystals of bobfergusonite from a phosphate nodule in pegmatite. Note the large (7.5cm) twinned crystal on the left side of the specimen.
Photo ID: 720638     Uploaded by: Petr Gadas   View Count: 192   Approval status: Public galleries    Type: Photo - 1600 x 1287 pixels (2.1 Mpix)

JT5-V83Cordierite, Quartz

Horní Bory, Křižanov, Žďár nad Sázavou District, Vysočina Region, Czech Republic

Dimensions: 13 cm x 6 cm x 5 cm
Largest Crystal Size: 32 mm

Euhedral grey-bluish colored crystals of cordieirite up to 3 cm in quartz-rich leucosome from migmatized granulitic gneisses.
Photo ID: 720544     Uploaded by: Petr Gadas   View Count: 241   Approval status: Public galleries    Type: Photo - 1615 x 1035 pixels (1.7 Mpix)

C05-QYYFluor-buergerite, Opal

Mexquitic, San Luis Potosí, Mexico

Dimensions: 82 mm x 62 mm x 29 mm
Largest Crystal Size: 19 mm

Typical black-brownish crystals up to 19 mm on rhyolitic matrix.
Photo ID: 719385     Uploaded by: Petr Gadas   View Count: 315   Approval status: Public galleries    Type: Photo - 2576 x 1927 pixels (5.0 Mpix)

FJY-4TMElbaite, Polylithionite

Rožná pegmatite, Rožná, Žďár nad Sázavou District, Vysočina Region, Czech Republic

Dimensions: 88 mm x 61 mm x 56 mm
Largest Crystal Size: 38 mm

Nice blue crystal of elbaite 38x23mm in polylithionite matrix from Borovina-hillock near Rožná.
Photo ID: 719383     Uploaded by: Petr Gadas   View Count: 121   Approval status: Public galleries    Type: Photo - 1891 x 1803 pixels (3.4 Mpix)
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