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Alfredo Petrov's Mindat Home Page

My PageMy PhotosMy GalleriesMy ArticlesMy FavouritesMy Sponsored PagesMy EventsContact Me

About Alfredo Petrov

Registered member joined prior to 15th Oct 2005 (unrecorded)
Member of the Management Group

Alfredo Petrov has uploaded:
302 Mineral Photos
60 Locality Photos
44 Other Photos

Alfredo has published 5 articles on mindat.org  RSS Link to blog for Alfredo Petrov
 
Alfredo does not yet have a home page article.

 

Favourite Photos

QRL-0J6Petroleum

Balochistan, Pakistan

Petroleum (yellow), with bubble, as inclusion in quartz crystal.
Dr. Stanley B. Keith specimen; Alfredo Petrov photo; fov ~1cm.
Copyright: © alfredo petrov      Photo ID: 471378     Uploaded by: Alfredo Petrov   View Count: 970   Approval status: Public galleries    Type: Photo - 1280 x 960 pixels (1.2 Mpix)

1V4-LP3Quartz : SiO2, Petroleum

Balochistan, Pakistan

Dimensions: 1.5 cm x 1.2 cm x 0.8 cm

1.5 x 1.2 x 0.8 cm.
A triangular cavity filled with yellow petroleum, with a moving methane bubble and several other tiny negative crystals with petroleum/bubbles. It also has visible asphaltite (bituminous hydrocarbons) inclusions. It fluoresces bright blue under long-wave UV.

Mindat.org Photo of the Day - 27th Apr 2014
Copyright: © Luciana Barbosa      Photo ID: 447682     Uploaded by: Luciana Barbosa   View Count: 2659   Approval status: Public galleries    Type: Photo - 1000 x 625 pixels (0.6 Mpix)

Agate

Mahallat, Markazi Province, Iran

Happy Agate. Iran People Call it: (Soltaniye agate)

Mindat.org Photo of the Day - 2nd Mar 2012
Copyright: © Geosource      Photo ID: 439983     Uploaded by: Farid Mohammadi   View Count: 1887   Approval status: Public galleries    Type: Photo - 1024 x 468 pixels (0.5 Mpix)

GVM-2CYHaüyne : (Na,Ca)4-8(Al6Si6O24)(SO4,S,Cl)1-2

Mendig, Laach lake volcanic complex, Eifel, Rhineland-Palatinate, Germany

Field of view 2.2 mm. Haüyne crystal with rounded edges and brown inclusion. Collection of Volker Betz.

Mindat.org Photo of the Day - 2nd Feb 2012
Copyright: © Volker Betz      Photo ID: 436140     Uploaded by: Volker Betz   View Count: 2352   Approval status: Public galleries    Type: Photo - 963 x 722 pixels (0.7 Mpix)

Alto Chapare 1997

Alto Chapare District, Chapare Province, Cochabamba Department, Bolivia

Alto Chapare is in many places covered in dense jungle like this. One wonders how any of the mineral wealth was ever discovered. The answer is that prospectors used the river bank and rocks during the time year with low water to prospect up the river and stream systems till they found something promising and the they would start to clear the jungle away.
Photo ID: 414324     Uploaded by: Rock Currier   View Count: 281   Approval status: Public galleries    Type: Photo - 1876 x 1242 pixels (2.3 Mpix)

KKC-EM8Quartz (Var: Chalcedony) : SiO2

Multiple photos available
Pajcha Pata, Esteban Arce Province, Cochabamba Department, Bolivia

A small piece of silicified limestone with secondary fillings of blueish chalcedony in the voids in between. The blueish chalcedony (see second photo shot in incandescent light) shows a rather strong fluorescence of green color in short-wave UV light. Some of the chalcedony shows a botryoidal habit and can also be overgrown by small quartz crystals. In these cases the fluorescence shows a banding that coincides with the agatoid banding seen in the wall-lining chalcedony. The creme-colored parts are completely silicified (no calcite is left in the matrix), resemble porcelain in places and are almost opaque. They show a white and blueish white fluorescence. Pure blue patches are reflections of the UV lamp.
Width of the specimen: 7cm.
UV photo white balanced to 5000K.
Found in April 2010 in the rubble at the road cut shown in the locality photos. Collection Alfredo Petrov.

Mindat.org Photo of the Day - 26th Oct 2011
Copyright: © aca      Photo ID: 301256     Uploaded by: Amir C. Akhavan   View Count: 3156   Approval status: Public galleries    Type: Photo - 1024 x 809 pixels (0.8 Mpix)

N8G-CJ3Mordenite : (Na2,Ca,K2)Al2Si10O24·7H2O, Quartz (Var: Chalcedony) : SiO2

Kawazu, Shizuoka Prefecture, Chubu Region, Honshu Island, Japan

Beadroll chalcedony-coated mordenite.

FoV = 1.8 cm,
Olympus Zuiko MC Macro 38mm F3.5/Nikon Multiphot/Nikon D80

Mindat.org Photo of the Day - 13th Sep 2010
Copyright: © R. Tanaka      Photo ID: 247684     Uploaded by: R. Tanaka   View Count: 2643   Approval status: Public galleries    Type: Photo - 686 x 1024 pixels (0.7 Mpix)

EMU-RAAAnalcime : Na2(Al2Si4O12)·2H2O, Smectite Group : A0.3D2-3[T4O10]Z2·nH2O, Chabazite

Punta del Aguila, Playa Blanca, Yaiza, Lanzarote, Las Palmas Province, Canary Islands, Spain

Field of view ca. 5 mm. Clear Analcime crystals on clay minerals, which are white inside the crystals. Associated with Chabazite. Zeolite Collection of Volker Betz.

Mindat.org Photo of the Day - 20th Apr 2008
Copyright: © Volker Betz      Photo ID: 160295     Uploaded by: Volker Betz   View Count: 3509   Approval status: Public galleries    Type: Photo - 878 x 722 pixels (0.6 Mpix)

TLU-R4CCopper : Cu, Gypsum : CaSO4·2H2O

Twin Buttes Mine, Twin Buttes, Pima District, Sierrita Mts, Pima Co., Arizona, USA

Image is 3 mm wide.
Copper crystals included in clear gypsum.

Mindat.org Photo of the Day - 23rd Dec 2014
Copyright: © 2004 D. Schläfli      Photo ID: 18305     Uploaded by: Dominik Schläfli   View Count: 1355   Approval status: Public galleries    Type: Photo - 960 x 640 pixels (0.6 Mpix)

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