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native arsenic on barite from Oberschlema, Ore Mountains, Germany
Coal and white cube flammable firelighters
Hematite crystal background.
Piece of coal on white background.
Coal on granite background. Found in an abandoned rail bed in Connecticut.
Pieces of natural wood charcoal isolated on a white background. Hard wood charcoal.
Calmitacea inside a peace of stone. The fossil was growing in the Carboniferous Period (around 360 to 300 million years ago).
Lump of coal isolated on a white background
Magnified close up of mineral encrusted basalt rock.
99.9% fine yttrium isolated on white background
Obsidian volcanic igneous rock geological sample
Black coal chunk, anthracite, isolated on white background. Close-up
Coal from the abandoned railbed of the Shepaug Valley Railroad in Washington, Connecticut, which operated from 1872 to 1948. The trains may have used this coal for fuel and carried it to destinations on the railroad's Newtown to Litchfield route. This appears to be bituminous coal. The background is granite. Black-and-white photo in 16:9 format.
Arsenic with rammelsbergite
Plant fossil from the Carboniferous, Germany, Saarland
Charcoal isolated on white background
Magnified close up of large crystal white and black granite.
anthrazite coal from Ibbenburen, Germany isolated on white background
piece of coal isolated on white
Cobo Pozzolana gneiss, with its distinctive Cobalt blue hue.
Natural wood charcoal is used as fuel for traditional cooking
Coal from the Shepaug Valley Railroad bed. The railroad operated from 1872 to 1948 in western Connecticut. This coal, used for heating in the 19th and 20th centuries, probably fell off a rail car. The background is stone tile.
some anthracite coal sample on a white background
Devonian microfossils in limestone matrix include circular and cylindrical crinoids, fan-shaped brachiopod (shell) fragments, speckled bryozoan fragments. Rock is about 1 1/2\
Imprint of an ancient plant on a stone in the hands of a man
Obsidian minerals, flint stone used to make tools during stone-age. Natural black obsidian stone on white background
coal isolated over white background
Magnified close up of a metamorphic rock.
Free Images: "bestof:CannelCoalWhite.jpg en Cannel coal specimen from the Pennsylvanian of northeastern Ohio Scale bar is 1 0 cm Own Wilson44691 2008-12-17 Photograph taken by Mark"
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