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horn snail fossile stone with white background
...an old Spanish coin, a means of payment from the Iberian Peninsula made of metal
Micrograph of a moss leaf, Dicranum, with elongated cells, and an elongated midrib (costa) that may be the water conducting cells of the leaf, with polarization at 100x.
bunch of natural sponges
rough round agate mineral sample with outer shell geode
Mayan Sacrificial Dagger - Knife Arrowhead
Apache tear (obsidian) from the USA
prismatic quartz mineral clusters on rock specimens from the UK
Close-up of a group of four differently colored stones in a stream bed. Different textures surrounded by cold water.
Acid sulphate mudpool at the Sulphur Flats in Rotorua, New Zealand.
Other types of mushrooms have pores instead of gills. Like gills, pores produce spores, but they appear as small, sponge-like holes instead of thin blades. The little holes lead to tubes inside the cap. As spores mature, they eventually fall from the tubes out of holes and into their environment.
chinese medicine Rhizoma Cibotii, Cibotium barometz
internal tissue of a sea creature's shell. pores. macro photo.
Frozen Puddle in the Meadow, Canada
Beautiful Stone texture and background. Rock texture. Seamless rock texture bakground closeup
Concretion formations in a rock in the Grand Staircase-Escalante National Monument in southern Utah during the fall. Concretions are precipitated mineral deposits that form in the spaces of sedimentary rock.
Waste water and dirty foam pollute the environment. Sewage or industrial waste
Photomicrograph of freshwater leech. Sucker attached to cover slip at bottom. Live specimen. Wet mount, 2.5X objective, transmitted brightfield illumination. Note - motion blur of live animal, very shallow depth of field, chromatic aberration and uneven focus are inherent in light microscopy.
Boiling water bubbler Geyser. Active geyser with major eruptions. Yellowstone NP, Wyoming, USA
glaucophane schist mineral sample under light microscopy
Spider webs on dead cactus
Cross section of rock  backgrounds
Petrified Forest National Park, a natural attraction place with many petrified tree trunks and fossils, in Arizona, USA.
Ammonite in limestone rock (Bavaria, Germany)
Hand made cross section of a branch from a knotweed plant, Reynoutria japonica, showing the cortex at 40x with polarization.
Calama, Chile
Stones texture nature background photo, High Resolution for 3D.
epidote skarn mineral sample under light microscopy
color natural mineral collection as nice background
Mica, silicate phyllosilicate.
Free Images: "bestof:Hoplopariabearpawensis.jpg Hoploparia bearpawensis en fossil on display at the San Diego County Fair California USA own Stickpen 2010-06-16 Hoploparia"
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Young female mummy from near Lupo, Peruvian Andes, about 550 years old - San Diego Museum of Man - DSC06926.JPG
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Unidentified glass fruit - De Young Museum - DSC00305.JPG
Gorilla gorilla - San Francisco Zoo - San Francisco, CA - DSC03909.jpg
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Reliefs - Spreckels Temple of Music - San Francisco, CA - DSC05238.JPG
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Balboa park crowds nighttime palm trees lights.jpg
Sunset at la jolla shores.jpg
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