by Unknown User | May 24, 2019
GARNET in SCHIST DESCRIPTION This is a photo of a small (~2mm) garnet (possibly almandine) found in a specimen of mica schist from the Black Hills. PHOTOGRAPH DETAILS Magnification: ~4.3X (crop) Field of view: ~1/4” x 5/16“ (5.6mm x 8.4mm) Images in focus stack: 70...
by Unknown User | May 24, 2019
PYRITE (CUBE) DESCRIPTION This is a photo of a pyrite cube, possibly from Washington State. The side-lighting in the photo highlights the topographic-like striations on the surface, while the black areas are reflecting the camera lens/possibly the room (the shutter...
by Unknown User | May 24, 2019
PYRITE “SUN” DESCRIPTION This is a photo of a pyrite “sun” (or “dollar”) from Illinois. These small coin-shaped specimens are found in compacted shale layers above or within coal deposits. PHOTOGRAPH DETAILS Magnification: ~2.1X Field of view:...
by Unknown User | May 24, 2019
FLUORITE DESCRIPTION This is a photo of fluorite. The flash here was positioned so that most of the light reflected off the specimen’s face, highlighting the stepped growth of the cubic crystals. PHOTOGRAPH DETAILS Magnification: ~2.2X Field of view: ~7/16” x...
by Unknown User | May 24, 2019
GIBEON METEORITE DESCRIPTION This is a photo of a Gibeon meteorite (iron, IVA class) fragment from Namibia, featuring the Thomson (Widmanstatten) patterns. It took hundreds of thousands, if not millions of years for these patterns to form as the asteroid slowly cooled...
