Ooids in thin section.
Ooids are spherical bodies of calcium carbonate with an internal structure of concentric layers. Its nucleus can be a fragment of other carbonate material or clastic sediment.
seen from China
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seen from United States
seen from United States
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seen from United States

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seen from Germany
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seen from Germany
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seen from Venezuela
seen from United States
Ooids in thin section.
Ooids are spherical bodies of calcium carbonate with an internal structure of concentric layers. Its nucleus can be a fragment of other carbonate material or clastic sediment.
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La "calcita de Pandos" se refiere a la mina de calcita de Pandos, una explotación minera ubicada cerca de Cueto (Turtzioz), en el País Vasco (España). Es una mina de calcita única en Europa y es una zona de interés para excursionistas. La calcita es un mineral compuesto de carbonato cálcico (\(CaCO_{3}\)) y se utiliza en la fabricación de cemento y cal.
L’Aguzou Cave, Escouloubre, Aude, Languedoc-Roussillon, France Calcitas
Deactivated lead mine, Iporanga-SP, Brazil. In some of the photos is possible to see calcite precipitating.
Testing a speleothem with hydrochloric acid. The calcium carbonate present in the calcite of the rock reacts with this acid and produces bubbles, carbon dioxide gas, water, and calcium chloride.
Anel regulável folheado prata em calcita ótica (pedra natural não é sintética)A Calcita Ótica, como é chamada, tem tudo a ver com os olhos e
Anel regulável folheado prata em calcita ótica (pedra natural não é sintética)A Calcita Ótica, como é chamada, tem tudo a ver com os olhos e