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George R. Rossman's Photo Gallery

QN6-R3PPlanerite

Mona Lisa Mine, Porter Mountain, Gilham, Polk Co., Arkansas, USA

Field of View: 88 mm

Light blue planerite identified by Raman spectroscopy. Tiny colorless wavellite crystals are on part of the planerite (separate photograph).
Copyright: © California Institute of Technology      Photo ID: 808676     Uploaded by: George R. Rossman   View Count: 72   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

YTR-HR2Wavellite

Mona Lisa Mine, Porter Mountain, Gilham, Polk Co., Arkansas, USA

Field of View: 2.9 mm

Colorless wavellite crystals identified by Raman spectroscopy. Blue matrix is planerite.
Copyright: © California Institute of Technology      Photo ID: 808674     Uploaded by: George R. Rossman   View Count: 39   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

8FP-VGERouaite

Mona Lisa Mine, Porter Mountain, Gilham, Polk Co., Arkansas, USA

Field of View: 3.95 mm

Blue rouaite identified by Raman spectroscopy gave an excellent match to the standard specimen in the RRUFF database.
Copyright: © California Institute of Technology      Photo ID: 808673     Uploaded by: George R. Rossman   View Count: 79   Approval status: Public galleries    Type: Photo - 1280 x 1024 pixels (1.3 Mpix)

06M-890Brochantite

Pacoima Canyon pegmatite locality, Pacoima Canyon, San Gabriel Mts, Los Angeles Co., California, USA

Field of View: 33 mm

A thin layer of blue-green brochantite staining the surface of feldspar and quartz. Identification by Raman spectroscopy.
Copyright: © California Institute of Technology      Photo ID: 792062     Uploaded by: George R. Rossman   View Count: 82   Approval status: Public galleries    Type: Photo - 1382 x 1037 pixels (1.4 Mpix)

0RN-G0UMolybdenite

Pacoima Canyon pegmatite locality, Pacoima Canyon, San Gabriel Mts, Los Angeles Co., California, USA

Dimensions: 28 mm x 20 mm x 4 mm

28 mm wide molybdenite crystal on white albite feldspar. Both identified by Raman spectroscopy.
Copyright: © California Institute of Technology      Photo ID: 792060     Uploaded by: George R. Rossman   View Count: 94   Approval status: Public galleries    Type: Photo - 1152 x 864 pixels (1.0 Mpix)

QYH-CD8Hexamolybdenum, Krotite, Hercynite

Northwest Africa 1934 meteorite, Northwest Africa Meteorites

SEM image of a hexamolybdenum crystal surrounded by krotite with adjacent hercynite from the NWA 1934 meteorite. This is second documented occurrence of the phase. It is a molybdenum dominant alloy with ruthenium, platinum, iridium, osmium vanadium, tungsten, rhodium, nickel and iron. SEM image credit: Chi Ma.
Copyright: © California Institute of Technology      Photo ID: 615438     Uploaded by: George R. Rossman   View Count: 285   Approval status: Public galleries    Type: Photo - 1198 x 776 pixels (0.9 Mpix)

1LF-P3LHexamolybdenum, Perovskite

Allende meteorite, Pueblito de Allende, Chihuahua, Mexico

SEM image of a hexamolybdenum crystal surrounded by perovskite with adjacent spinel from the Allende meteorite. It is a molybdenum dominant alloy with ruthenium, platinum, iron, iridium, osmium, tungsten, and nickel. SEM image credit: Chi Ma.
Copyright: © California Institute of Technology      Photo ID: 615437     Uploaded by: George R. Rossman   View Count: 287   Approval status: Public galleries    Type: Photo - 1189 x 783 pixels (0.9 Mpix)

Q04-H3AQingheiite-(Fe2+)

Chandlers Mill Quarry, Newport, Sullivan Co., New Hampshire, USA

Twenty-one mm wide, black quingheiite-(Fe2+) sample on colorless quartz. This was originally called ferrowyllieite by Moore. Later, it was recognized that it was a possible new member of the wyllieite group (Moore and Ito, 1979, Min. Mag. v. 43, p. 227, their wyllieite sample #2). This is part of the sample they analyzed in the 1979 paper. They recommended that the name be kept as ferrowyllieite at that time. After the discovery of quingheiite, the name, quingheiite-(Fe2+) was adopted.
Copyright: © California Institute of Technology      Photo ID: 553177     Uploaded by: George R. Rossman   View Count: 492   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)

YXD-V9JPellyite

Gun claim, Wilson Lake, Itsi Mt., Watson Lake mining district, Yukon, Canada

Pale amber, 1.8 mm wide pellyite grain from the type locality.
Copyright: © California Institute of Technology      Photo ID: 542754     Uploaded by: George R. Rossman   View Count: 262   Approval status: Public galleries    Type: Photo - 1053 x 765 pixels (0.8 Mpix)

AUQ-TN4Butlerite

United Verde Mine, Jerome, Verde District, Black Hills, Yavapai Co., Arizona, USA

Orange butlerite crystals from the United Verde copper mine obtained from the US National Museum of Natual History (Smithsonian Institution) #95953. The identity of these crystals was verified by X-ray cell dimensions and crystal morphology.
Copyright: © California Institute of Technology      Photo ID: 428330     Uploaded by: George R. Rossman   View Count: 441   Approval status: Public galleries    Type: Photo - 1024 x 768 pixels (0.8 Mpix)
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