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Leiden leaf c.s. under microscope
American colony, New Sweden.
Is igneous rock formed by slow cooling from vulcanic magma of basaltic composition
Tiger’s eye mineral stone sample macro photography
Petrified wood, 20 million years old wood. Wood turned into stone
A 1998 Austria postage stamp with an illustration of a landscape scene within Kalkalpen National Park in Upper Austria; postmarked in Vienna (Wien).
A chert conglomerate from the Fig Tree Formation of the Barberton greenstone belt
Piece of natural mineral gemstones in gift store
Details of a fragment of a quartz crystal geode
Magnified close up of porphyritic granite with fledspar.
Big natural stone green amber on white background
City Square information sign in Boston, Massachusetts, USA.
a sample of minerals from nature
Fossilised Fish
pyrite iridescent round shape. Beautiful mineral, background, texture. Soft focus selective focus
Minnesota County Shapes and Names at State Capitol Building in St. Paul Minnesota
Charyn Canyon and the Valley of Castles known as Grand Canyon of Kazakhstan.
Mikroklin Amazonit Kristall peak Teller County, Colorado
boulder opal from Queensland, Australia isolated on white background
Blastomycosis is a fungal infection caused by inhaling Blastomyces dermatitidis spores. If it involves only the lungs, it is called pulmonary blastomycosis. Only about half of people with the disease have symptoms, which can include fever, cough, night sweats, muscle pains, weight loss, chest pain, and feeling tired.
Tasty nori seaweed as a background. Top view.
Eroded sedimentary rocks of Cedar Breaks National Monument near Bryan Head Utah
The stalactites are in wooden trays in an exhibition hall
Agate is a microcrystalline variety of quartz, chiefly chalcedony, cryptocrystalline form of silica.  Although agates may be found in various kinds of rock, they are classically associated with volcanic rocks but can be common in certain metamorphic rocks. Most agates occur as nodules in volcanic rocks or ancient lavas where they represent cavities originally produced by the disengagement of volatiles in the molten mass which were then filled, wholly  by siliceous matter deposited in regular layers upon the walls. Cathedral Valley, Capitol Reef National Park, Utah.
old book isolated on white background
Magnified close up of an igneous rock with metallic minerals in the cracks.
L'anse aux Meadows, Canada - June 28, 2015: The plaque explaining the timeline and historical significance of the L'anse aux Meadows site in Newfoundland, Canada, by the Historic Sites and Monuments Board of Canada.
Vintage book of 1794 first inner page
Robin Hoods Bay,England - July 11, 2016:map showing the route of the 192 mile coast to coast walk, made famous by Alfred Wainwright, beginning at St Bees Head Cumbria on England's west coast and ending at Robin Hoods Bay on the east coast, with a photograph of Wainwright
nephrite mineral stone
Free Images: "bestof:Fig5-Lyell.jpg Figure 5 Figures from the book Student's Elements of Geology 1870 Charles Lyell Free for all use PD-old Figures from Student's Elements of"
Female student with open tree identification book looking at tree leaves to identify species.jpg
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Fluoresce figures.jpg
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Black metal figures.jpg
Three figures.jpg
Palaistra_scene_Louvre_G457.jpg
Student walking by the main entry building.jpg
An event leader helps an archery student practice her skills.jpg
Student being shown by teacher how to correctly hold bird being prepared for banding.jpg
Student carefully marks an turtle egg which notes its orientation in the nest.jpg
Teacher handing student wetland plants to put in newly established pond.jpg
A young student pretends to extinguish the flames of a pretend fire.jpg
Student pouring river water into beaker held by teacher and service employee overseeing in background.jpg
An environmental education student gets to feel the back of a young alligator on the refuge.jpg
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Metal door.jpg
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Iron fence on window.jpg
Old antique window.jpg
Old iron work on entrance door.jpg
Old iron work on window.jpg
Ornate yard gate.jpg
Red door and window.jpg
Weathered barn wood.jpg
Windows blinds drapes.jpg
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Arab Horse Soldiers - Spahis.jpg
StikiJunior Mascot.svg
The_Four_Evangelists_(Abraham_Bloemaert).jpg
Classical landscape with small waterfall and village.jpg
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