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Mica, silicate phyllosilicate.
columnar basalt rock, Cape Stolbchaty on Kunashir Island, in the foreground bases of lava basalt columns form a kind of pavement
Rock formations on Oahu coast
Ancient stone jungle like an alien world
Marble mining plant at the east of the island. White stone in blocks and gravel. Seaside of the Thracian sea. Porto Vathy, island Thassos (Thasos), Greece.
bunch of natural sponges
Eggs of seabirds, terns on a nest on the island of Tiligul estuary, southern Ukraine
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.
Texture of old clay wall, shell rock brick
White marble cutting factory
Agatized Coral with Chalcedony stalactites
Idyllic panorama from Lo Fu Tau, also known as Tiger's Head, located in the Lantau North Country Park. The hike goes from Tung Chung to Discovery Bay with another path connected to the Olympic Trail which goes from Tung Chung to Mui Wo.
...an old Spanish coin, a means of payment from the Iberian Peninsula made of metal
feces of water buffalofeces of water buffalo
Boiling water bubbler Geyser. Active geyser with major eruptions. Yellowstone NP, Wyoming, USA
quail eggs,
The normal liver cells or hepatocytes contain lipid droplets, more frequent near the central vein of hepatic lobules, that can be demonstrated using osmium tetroxide as fixative. In steatosis or fatty liver disease, the amount of lipid droplets is pathologically very increased.
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.
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.
Calama, Chile
This rock, made of salt, limestone and sandstone, is also known as Paredão Salitroso in Portuguese. It is located in Porto Feliz City, in the state of São Paolo - Brazil
Acid sulphate mudpool at the Sulphur Flats in Rotorua, New Zealand.
A view from the Kizilcukur Valley in the Cappadocia region of Turkey
blocks of limestones in a quarry.
Rock
Central California's High Sierra Range.
Close-up of bird's nest on tree branch
Frozen Puddle in the Meadow, Canada
internal tissue of a sea creature's shell. pores. macro photo.
Interesting  pattern in hot springs. Looks like a tree to me
Free Images: "bestof:Dendroolithus-eggs.jpg en Dinosaur eggs Dendroolithus sp from Kaoguo Formation Henan China on display at the San Diego County Fair California USA own Stickpen"
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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
Reliefs - Spreckels Temple of Music - San Francisco, CA - DSC05238.JPG
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Amtrak station and fountain in downtown San diego.jpg
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