Alex Hyde / Cave Pearls, formed as dripping water rich in calcium salts deposits calcite around a small nucleus (often a sand grain). The constant movement of each cave pearl by the dripping water keeps them roun...
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Alex Hyde / Cave Pearls, formed as dripping water rich in calcium salts deposits calcite around a small nucleus (often a sand grain). The constant movement of each cave pearl by the dripping water keeps them roun...
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Alex Hyde / Cave Pearls, formed as dripping water rich in calcium salts deposits calcite around a small nucleus (often a sand grain). The constant movement of each cave pearl by the dripping water keeps them roun...
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John Cancalosi / Calcite(red) and Willemite(green), under flourescent light, Franklin New Jersey.
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John Cancalosi / Calcite and willemite, Franklin New Jersey, under incandescent light.
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John Cancalosi / Rock containing Willemite, Franklinite, Zincite, Calcite from New Jersey, USA
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Andrew Cooper / Calcite vein between grass. Dartmoor National Park, UK, June.
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Philippe Clement / Rounded nodules on the beach near Osmington Mills, made of calcite-cemented sandstone from the Bencliff Grit Formation along the World Heritage Site Jurassic Coast, Dorset, UK, November 2012
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Philippe Clement / Rounded nodules on the beach near Osmington Mills, made of calcite-cemented sandstone from the Bencliff Grit Formation along the World Heritage Site Jurassic Coast, Dorset, UK, November 2012
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Floris van Breugel / A wide variety of fluorescent minerals including scheelite (blue/white), calcite (red), silica coatings containing uranyl ions (green), fluorite (pink), and 'desert varnish' (yellow/orange), populate...
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Jean E. Roche / Calcite and Aragonite deposits in the Clamouse caves, Herault, Languedoc, France, August 2008
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Robert Thompson / Calcite cradle and stalactites in the Marble Arch Caves, County Fermanagh, Northern Ireland, UK, January 1995
