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Representatives of the Lemnaceae, the duckweed family, are well-adapted for use as bioindicators for testing soil and water for toxic substances.  Their rapid multiplication and the simplicity of their anatomy are important advantages for this use.
Pegmatite rock close up with many crystals.
Close-up shooting of a green agate stone mineral surface isolated on white background. Its a macro shot shows nature beautiful details with back lit. Agate is a kind of natural gemstone. Abstract pattern. Good for Wallpaper texture background. Turquoise, blue
Heliamphora pulchella is endemic to some of the table-top mountains in the Guiana highlands. The inside of the pitchers is covered with white hairs.
Large piece of polished Baltic Sea amber with the insects inside on the black background
a spring scene with cherry blossoms in bloom
Agate crystal cross section background. Natural translucent agate crystal surface slice. Macro close-up of ore, abstract structure
malachite mineral specimen stone rock geology gem crystal
Tiger’s eye mineral stone sample macro photography
Muscovite gneiss with large flat single crystals, made of light mica, hand specimen from Germany, Bavaria, Upper Palatinate, stacked photo.
Natural agate surfaces, suitable for backgrounds and wallpapers.
Carnivorous plants  Pinguícula in the greenhouse pinguicula among plants
Chiton, Tripoplax regularis. on a rock at Salt Point State Park in Sonoma County, California.
cross section of blue agate isolated on black background
From the mineral collection, Kobalt-Smithsonit
Image of a crystal cup of enlightenment with colored light
Heliamphora pulchella is endemic to some of the table-top mountains in the Guiana highlands. The inside of the pitchers is covered with white hairs and filled with liquid.
Amazing Colorful Agate Crystal stone cross texture background.
Mesembs (Lithops gracilidelineata) South African plant from Namibia in the botanical collection of supersucculent plants
Photomicrograph of Volvox globator, a green algae in various stages of development. Dark green spots are daughter colonies forming inside of parent colony. Live specimen. Wet mount, 10X objective, transmitted brightfield illumination.
Heliamphora uncinata was described only recently. Its prominent feature is a hooked lid.
Silica Quartz mineralisation around purple fluorite cubic crystals in a mineral rock sample
close up of native gold from Zlate Hory, Czech Republic
Mineral Fusinus sp. Pliozän
Porcelain or Mosaic Orchid, chloraea magellanica, Carretera Austral, Patagonia Chile
Studio shotting of Crystal, suitable for design element.
This plant is endemic to the Canary Islands. I found this plant on Tenerife
Magnified close up of porphyritic granite with fledspar.
Free Images: "bestof:Stylidium species, foliis - WA.jpg Detail of base of Stylidium most likely Stylidium hispidum on gravel and dolerite in Jarrah Forest at a locale cleared by a"
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