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Ed Clopton's Photo Gallery

XQ5-2LJGypsum CaSO4·2H2O

Multiple photos available
00800050016007118006728.jpg
Lily Mine, Pisco Umay, Ica, Peru

Dimensions: 38 mm x 32 mm x 15 mm

Gypsum ram's horn (point of attachment toward bottom of photo) that has been covered with transparent prismatic crystals of gypsum oriented to underlying crystals that make up the ram's horn, with the result that the prismatic crystals lie tangent to the curve. The curved core of the specimen fluoresces yellow and white in SWUV with slight phosphorescence. Purchased in 2020 from Lehigh Minerals.
Copyright: © 2020 E. L. Clopton      Photo ID: 1095208     Uploaded by: Ed Clopton   View Count: 8   Approval status: Public galleries    Type: Photo - 1378 x 1756 pixels (2.4 Mpix)

RN0-3QFGypsum CaSO4·2H2O

Multiple photos available
00990410016007112534820.jpg
Lily Mine, Pisco Umay, Ica, Peru

Dimensions: 44 mm x 34 mm x 30 mm

Gypsum ram's horn (point of attachment toward bottom of photo) that has been covered with transparent prismatic crystals of gypsum oriented to underlying crystals that make up the ram's horn, with the result that the prismatic crystals lie tangent to the curve. Particles of matrix are included in the later crystals. The curved core of the specimen fluoresces yellow and white in SWUV with slight phosphorescence. Purchased in 2020 from Lehigh Minerals.
Copyright: © 2020 E. L. Clopton      Photo ID: 1095202     Uploaded by: Ed Clopton   View Count: 5   Approval status: Public galleries    Type: Photo - 1776 x 2349 pixels (4.2 Mpix)

View from Singepole Mountain

07582430016007090565901.jpg
Singepole Mountain, Paris, Oxford County, Maine, USA

View from Singepole Mountain.
Copyright: © 2020 E. L. Clopton      Photo ID: 1095191     Uploaded by: Ed Clopton   View Count: 5   Approval status: Public galleries    Type: Photo - 3648 x 2736 pixels (10.0 Mpix)

Quartz with glacial polish near summit of Singepole Mountain

Multiple photos available
08862820016007084979699.jpg
Singepole Mountain, Paris, Oxford County, Maine, USA

Quartz with glacial polish and striations on top of Singepole Mountain. US 25-cent coin (right center, in shadow) is 24 mm diameter for scale; polished quartz surface is about 35 cm left-right.
Copyright: © 2020 E. L. Clopton      Photo ID: 1095187     Uploaded by: Ed Clopton   View Count: 22   Approval status: Public galleries    Type: Photo - 3648 x 2736 pixels (10.0 Mpix)

E19-KXUStaurolite Fe2+2Al9Si4O23(OH)

07857410016007074232472.jpg
Cook Road Staurolite locality, Windham, Cumberland Co., Maine, USA

Field of View: 20 cm

A "mine run" assortment of loose crystals and matrix specimens of staurolite from Cook Road, representing the abundance of specimens that could be collected while the now-extinct site was active in the 1960s and 1970s. Avid mineral collector Josephine Scholl, who lived just a few km from Cook Road, collected uncounted hundreds of specimens of Cook Road staurolite. US 5-cent coin is 21 mm diameter for scale; the largest matrix specimen at right measures about 8.8 cm long. Maine Mineralogical and Geological Society specimens, ex Josephine Scholl collection.
Copyright: © 2020 E. L. Clopton      Photo ID: 1095185     Uploaded by: Ed Clopton   View Count: 11   Approval status: Public galleries    Type: Photo - 3208 x 2486 pixels (8.0 Mpix)

Glacial polish and striations

Multiple photos available
05826400016007006699991.jpg
South Lubec Road, Lubec, Washington Co., Maine, USA

Glacially polished and striated basalt. The ice moved toward the camera position from the upper right. Keys are about 5 cm long for scale.
Copyright: © 2020 E. L. Clopton      Photo ID: 1095166     Uploaded by: Ed Clopton   View Count: 15   Approval status: Public galleries    Type: Photo - 2736 x 3648 pixels (10.0 Mpix)

XME-N8FMarcasite FeS2

Multiple photos available
05168310015929183123621.jpg
Irene Quarry, Irene, Boone Co., Illinois, USA

Field of View: 147 μm

Termination of a blade of marcasite with skeletal growth forming a "gable" termination. On the rear is a thin, leaf-shaped plate, presumably also of marcasite (see second photo). Personally collected late 1980s. Scanned from a Polaroid print; SEM imaging by Greg Ludvigson, Northern Illinois University, late 1980s.
Copyright: © 2020 E. L. Clopton      Photo ID: 1060932     Uploaded by: Ed Clopton   View Count: 6   Approval status: Public galleries    Type: Photo - 1073 x 1345 pixels (1.4 Mpix)

277-23PMarcasite FeS2 , Pyrite FeS2

04365090015929169686713.jpg
Pint's Quarry, Raymond, Black Hawk Co., Iowa, USA

Field of View: 522 μm

Blade of marcasite with minute cubic pyrite crystals oriented epitactically along the edges. This mode of epitaxy is discussed in Richards et al. 1995 (see references). Personally collected in the 1980s. Scanned from a Polaroid print; SEM imaging by Greg Ludvigson, Northern Illinois University, late 1980s.
Copyright: © 2020 E. L. Clopton      Photo ID: 1060918     Uploaded by: Ed Clopton   View Count: 14   Approval status: Public galleries    Type: Photo - 1061 x 1355 pixels (1.4 Mpix)

CDX-89XBaryte BaSO4 , Quartz (Var: Chalcedony) SiO2

07222300015904151305649.jpg
Scenic, Pennington Co., South Dakota, USA

Dimensions: 32 mm x 30 mm x 16 mm
Field of View: 42.7 mm
Largest Crystal Size: 34.5 mm

Cluster of tabular golden-yellow barite crystals and chips of brecciated chalcedony on a piece of typical Badlands grey chalcedony. The barite fluoresces yellow and the chalcedony brilliant green under SWUV. Collected ca. 1985 by Ken Allgier.
Copyright: © 2020 E. L. Clopton      Photo ID: 1054182     Uploaded by: Ed Clopton   View Count: 21   Approval status: Public galleries    Type: Photo - 2065 x 2027 pixels (4.2 Mpix)

85T-CTMCalcite CaCO3

Multiple photos available
04416260015899082231262.jpg
Peske Quarry, Raymond, Black Hawk Co., Iowa, USA

Dimensions: 68 mm x 50 mm x 40 mm
Field of View: 78.7 mm
Largest Crystal Size: 11 mm

Sharp rhombohedral crystal 11 mm on edge of calcite, almost a cube, in a vug among much smaller similar crystals. Calcite is colorless with a thin, transparent brown coating; note that the coating has partially flaked off of the smaller crystal to the right of the largest crystal. Note also that the smaller crystals have complex scalenohedral crystals epitaxially oriented on the most acute rhombohedron corners (more apparent in the second photo). The large crystal probably orginally had one, too, on the small triangular pinacoid face. Collected in 1992 in Cedar Falls, Iowa from riprap produced by the Peske quarry.
Copyright: © 2020 E. L. Clopton      Photo ID: 1052731     Uploaded by: Ed Clopton   View Count: 20   Approval status: Public galleries    Type: Photo - 3152 x 2166 pixels (6.8 Mpix)
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