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James Wilkinson's Photo Gallery

P84-3KAQuartz : SiO2

Daniels, Howard Co., Maryland, USA

Dimensions: 5 inches x 8 inches
Largest Crystal Size: 4 cm

Photo ID: 799162     Uploaded by: James Wilkinson   View Count: 14   Approval status: Public galleries    Type: Photo - 1494 x 2656 pixels (4.0 Mpix)

512-500Feldspar Group, Quartz : SiO2, Mica Group

Multiple photos available
Simpsonville, Howard Co., Maryland, USA

Dimensions: 4 cm x 3 cm
Largest Crystal Size: 2 cm

translucent golden yellow feldspar--scratched by quartz
Photo ID: 792124     Uploaded by: James Wilkinson   View Count: 30   Approval status: Public galleries    Type: Photo - 2873 x 3850 pixels (11.1 Mpix)

Y4H-MNHMuscovite : KAl2(Si3Al)O10(OH)2, Quartz : SiO2

Daniels, Howard Co., Maryland, USA

Dimensions: 7 cm x 5.5 cm
Largest Crystal Size: 2.5 cm

Photo ID: 745840     Uploaded by: James Wilkinson   View Count: 30   Approval status: Public galleries    Type: Photo - 2480 x 3531 pixels (8.8 Mpix)

W79-UMPQuartz : SiO2, Quartz (Var: Smoky Quartz) : SiO2

Atholton, Howard Co., Maryland, USA

Dimensions: 4 cm x 3 cm

found in stream gravel about 1 mile east of Atholton

not scratched by quartz and slightly scratches a glass plate (hard to get a good angle with rounded surface of the pebble)

Photo ID: 745753     Uploaded by: James Wilkinson   View Count: 30   Approval status: Public galleries    Type: Photo - 1735 x 2077 pixels (3.6 Mpix)

RQ8-740Feldspar Group

Atholton, Howard Co., Maryland, USA

Dimensions: 3 cm x 3 cm

May be albite

Collected at road construction site about 2 miles northeast of Atholton
Photo ID: 744991     Uploaded by: James Wilkinson   View Count: 37   Approval status: Public galleries    Type: Photo - 2196 x 2700 pixels (5.9 Mpix)

PWV-0AAQuartz : SiO2, Quartz (Var: Rose Quartz) : SiO2

Simpsonville, Howard Co., Maryland, USA

Dimensions: 3 cm x 2 cm

Slight amount of rose coloring visible in center and bottom of specimen

collected in gravel bar of stream about 2 miles northeast of Simpsonville
Photo ID: 743450     Uploaded by: James Wilkinson   View Count: 36   Approval status: Public galleries    Type: Photo - 1799 x 2191 pixels (3.9 Mpix)

TKA-0UEQuartz : SiO2, Quartz (Var: Smoky Quartz) : SiO2

Simpsonville, Howard Co., Maryland, USA

Dimensions: 6 cm x 5 cm
Largest Crystal Size: 2.25 cm

found in gravel bar along stream about 2 miles northeast of Simpsonville
Photo ID: 743437     Uploaded by: James Wilkinson   View Count: 40   Approval status: Public galleries    Type: Photo - 2921 x 3949 pixels (11.5 Mpix)

1W2-R8THematite (Var: Specularite) : Fe2O3

Marriottsville, Howard Co., Maryland, USA

Dimensions: 4 cm x 3.25 cm

I am not sure of my identification
Photo ID: 743227     Uploaded by: James Wilkinson   View Count: 31   Approval status: Public galleries    Type: Photo - 1249 x 1412 pixels (1.8 Mpix)

3VX-GMECalcite : CaCO3, Hematite (Var: Specularite) : Fe2O3

Farmers Cooperative Limestone Quarry, New London, Frederick Co., Maryland, USA

Dimensions: 5 cm x 3 cm

I found this rock in a streambed near the abandoned quarry. The shiny black vein looks like specularite.
Photo ID: 742135     Uploaded by: James Wilkinson   View Count: 54   Approval status: Public galleries    Type: Photo - 2571 x 2770 pixels (7.1 Mpix)

3JU-0Y0Sphalerite : ZnS

Farmers Cooperative Limestone Quarry, New London, Frederick Co., Maryland, USA

Dimensions: 3 cm x 2 cm
Field of View: 2 cm

Light and dark brown crystalline material looks like Sphalerite
Photo ID: 741971     Uploaded by: James Wilkinson   View Count: 42   Approval status: Public galleries    Type: Photo - 663 x 1093 pixels (0.7 Mpix)
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