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Karl Volkman's Photo Gallery

D54-XRFPerovskite CaTiO3 , Kimzeyite Ca3(Zr,Ti)2((Si,Al,Fe3+)O4)3

03955820014946389682084.jpg
Magnet Cove, Hot Spring Co., Arkansas, USA

A 1mm perovskite with associated kimzeyite in matrix. Photographed by, and in the collection of, Don Volkman
Copyright: © Don Volkman 3/25/13      Photo ID: 524269     Uploaded by: Karl Volkman   View Count: 243   Approval status: Public galleries    Type: Photo - 901 x 954 pixels (0.9 Mpix)

72Y-YWCPyrite FeS2 , Baryte BaSO4

05182700014946389683619.jpg
Frostburg, Allegany Co., Maryland, USA

A mass of tarnished and slightly iridescent pyrites with white baryte on matrix. Field of view 2mm Photographed by, and in the collection of Don Volkman.
Copyright: © Don Volkman 3/25/13      Photo ID: 524266     Uploaded by: Karl Volkman   View Count: 228   Approval status: Public galleries    Type: Photo - 1280 x 1024 pixels (1.3 Mpix)

VXN-24KElectrum (Au, Ag)

06634200014946389683780.jpg
Butte Mining District, Butte-Silver Bow, Montana, USA

A small sheet of "electrum" (visually identified) collected during the summer of 2002 at one of the outer Silver/manganese halo mines of the Butte District. The sheet is 2mm by 2mm.

Photographed by, and in the collection of, Don Volkman. BB
Copyright: © Don Volkman 3/25/13      Photo ID: 524261     Uploaded by: Karl Volkman   View Count: 407   Approval status: Public galleries    Type: Photo - 1280 x 1024 pixels (1.3 Mpix)

PVH-38GMagnetite Fe2+Fe3+2O4

08040050014946389685971.jpg
Nordmark district, Filipstad, Värmland County, Sweden

A group of magnetite crystals on matrix, the largest crystal is 3mm across the large face.

Photographed by, and in the collection of, Don Volkman
Copyright: © Don Volkman 3/25/13      Photo ID: 524259     Uploaded by: Karl Volkman   View Count: 224   Approval status: Public galleries    Type: Photo - 993 x 862 pixels (0.9 Mpix)

PLU-V1JSphalerite ZnS , Quartz SiO2

09267610014946389683287.jpg
Butte Mining District, Butte-Silver Bow, Montana, USA

A complex sphalerite crystal mass approximately .75mm across collected by Don Volkman from a mine in the outer silver/manganese belt of the Butte District, Montana.

Photographed, collected, and in the collection of Don Volkman
Copyright: © Don Volkman 3/23/13      Photo ID: 523682     Uploaded by: Karl Volkman   View Count: 247   Approval status: Public galleries    Type: Photo - 1229 x 1009 pixels (1.2 Mpix)

6T3-39RGoethite α-Fe3+O(OH) , Quartz SiO2

00860560014946389692677.jpg
Estacion Ojo Laguna, Ahumada Municipality, Chihuahua, Mexico

A spray of goethite needles 1.5mm tall emerging from a quartz crystal cluster

Photographed by Karl Volkman. Cut and in the collection of Don Volkman.

Combined from 15 frames using Combine ZP
Copyright: © Don and Karl Volkman 19 July 12      Photo ID: 477468     Uploaded by: Karl Volkman   View Count: 157   Approval status: Public galleries    Type: Photo - 968 x 996 pixels (1.0 Mpix)

GF1-F0JGoethite α-Fe3+O(OH) , Quartz SiO2

02357480014946389696858.jpg
Estacion Ojo Laguna, Ahumada Municipality, Chihuahua, Mexico

A small mass of goethite sporting a pair of long needles reaching just over 2mm long.

Photographed by Karl Volkman. Cut and in the collection of Don Volkman.

Combined from 10 frames using Combine ZP
Copyright: © Don and Karl Volkman 19 July 12      Photo ID: 477467     Uploaded by: Karl Volkman   View Count: 224   Approval status: Public galleries    Type: Photo - 1258 x 1020 pixels (1.3 Mpix)

R2Y-RPAGoethite α-Fe3+O(OH) , Quartz SiO2

03968530014946389693103.jpg
Estacion Ojo Laguna, Ahumada Municipality, Chihuahua, Mexico

A 1mm tall mass of goethite needles partially enclosed in a group of quartz crystals.

Photographed by Karl Volkman. Cut and in the collection of Don Volkman.

Combined from 10 frames using Combine ZP
Copyright: © Don and Karl Volkman 19 July 12      Photo ID: 477466     Uploaded by: Karl Volkman   View Count: 168   Approval status: Public galleries    Type: Photo - 1181 x 1009 pixels (1.2 Mpix)

A9A-DPTGoethite α-Fe3+O(OH) , Quartz SiO2

05556040014946389695330.jpg
Estacion Ojo Laguna, Ahumada Municipality, Chihuahua, Mexico

root beer brown Crystals of Goethite on quartz. This is the largest grouping of the blades in this agate/geode. Field of View 2mm

Photographed by Karl Volkman. Cut and in the collection of Don Volkman

Combined from 6 Frames using Combine ZP.
Copyright: © Don and Karl Volkman 18 July 12      Photo ID: 477334     Uploaded by: Karl Volkman   View Count: 290   Approval status: Public galleries    Type: Photo - 872 x 833 pixels (0.7 Mpix)

4YC-7L6Goethite α-Fe3+O(OH) , Quartz SiO2

07588510014946389692057.jpg
Oco geode deposits, Três Pinheiros, Fontoura Xavier, Rio Grande do Sul, Brazil

A small mass, ~3mm tall, of possible goethite on quartz with masses of white and clear quartz grains

Photographed by, and in the collection of, Karl Volkman.

Stack of 15 frames combined using Combine ZP
Copyright: © Karl Volkman 16 July 12      Photo ID: 477032     Uploaded by: Karl Volkman   View Count: 405   Approval status: Public galleries    Type: Photo - 1100 x 1014 pixels (1.1 Mpix)
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