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small gray shiny metallic nugget just found by searchers on the white background

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iridescent goethite from Tharsis, Spain isolated on white background

Magnified close up of mineral encrusted basalt rock.

Selenium, a crystal lattice diagram, a piece of pure mineral and a precious stone.

Karakum Desert north of Darvaza / Derweze, Dashoguz Province, Turkmenistan: Darvaza gas crater, also known as the Door to Hell or Gates of Hell, is a burning sinkhole in a natural gas field, the result of a collapsed cavern. It it has been burning continuously since it was set alight by Soviet geologists in 1971. The crater has a diameter of approximately 70 meters and a depth of approximately 25 meters. Turkmenistan holds the world's 4th largest natural gas reserves.

Uranium element on a metal periodic table with yellowish grey metamictic Uranium on white background. 3D rendered icon and illustration.

Green quartz crystal isolated on the white background.

Natural specimen of Anthracite coal - metamorphic rock, a hard, compact variety of coal high carbon content, the fewest impurities, and the highest calorific content of all types of coal on black background

Magnified close up of maroon shale bands in granite intrusive rock.

Bubbles of Wastewater in Treatment tanks, industries, and environment.Wastewater treatment plant. Modern urban wastewater treatment plant.

Bismuth - rainbow metal mineral isolated on the white background

Raw galena ore, aka lead sulfide, with blue-grey color on dark background

iridescent goethite from La Union, Spain isolated on white background

A flock of Oystercatchers flying over Snettisham beach, Norfolk.

A faceted shard of sulfur, a yellow mineral. Isolated on gray background.

Background of bubbling mud, taken at thermal pools near Rotorua, New Zealand.

small green shiny metallic nugget just found by searchers on the white background

Magnified close up of basalt lava rock with air holes.

Copper nugget on an isolated grey background.

The white color rocks seen here along the shoreline of Lake Salda in Turkey were formed over time by microbes that trap minerals and sediments in the water. These so-called microbialites were once a major form of life on Earth and provide some of the oldest known fossilized records of life on our planet.

lead after pouring into water isolated on the white background

Free Images: "bestof:Ullmann reaction.gif Ullmann reaction en Image Ullmann_reaction gif 2005-07-11 V8rik V8rik Electrophilic aromatic substitution reactions Ullmann reaction"

Main symptoms of acute hemolytic reaction.svg

Reaction of Propan-1-ol and Copper(II) oxide to Propionaldehyde.svg

Alcohols - 8 (mesylation-halogenation).svg

Main symptoms of acute hemolytic reaction-el.svg

Gomberg Bachmann reaction mechn-Seite002.svg

Weiss reaction mechanism, Michael addition-Seite001.svg

Gomberg Bachmann reaction mechn-Seite001.svg

Haller-Bauer reaction mechanism V2-Seite001.svg

Eglinton reaction mechanism V6-Seite001.svg

Reaktionskoordinate der SN2-Reaktion.svg

Vinylcyclopropane-Cyclopentene rearrangement.svg