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History
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Georgius Agricola (fictive 1927 portrait)
Georgius Agricola (fictive 1927 portrait)
A water mill used for raising ore
A water mill used for raising ore
Fire-setting underground
Fire-setting underground
De re metallica
De re metallica
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Page from Treatise on mineralogy by Friedrich Mohs (1825)
Page from Treatise on mineralogy by Friedrich Mohs (1825)
Calcite is a carbonate mineral (CaCO3) with a rhombohedral crystal structure.
Calcite is a carbonate mineral (CaCO3) with a rhombohedral crystal structure.
Aragonite is an orthorhombic polymorph of calcite.
Aragonite is an orthorhombic polymorph of calcite.
The perovskite crystal structure. The most abundant mineral in the Earth, bridgmanite, has this structure. Its chemical formula is (Mg,Fe)SiO3; the re
The perovskite crystal structure. The most abundant mineral in the Earth, bridgmanite, has this structure. Its chemical formula is (Mg,Fe)SiO3; the red spheres are oxygen, the blue spheres silicon and the green spheres magnesium or iron.