Botryogen
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Botryogen is a hydrous magnesium sulfate mineral with formula: MgFe3+2·7H2O. It is also known as quetenite.
Specimen from Mina Santa Elena, Alcaparrosa, San Juan, Argentina with a red colored crystal of botryogen in a matrix of butlerite, copiapite and parabutlerite (size:5.7 x 4.1 x 2.5 cm)
Magnesium
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Magnesium is a chemical element; it has symbol Mg and atomic number 12. It is a shiny gray metal having a low density, low melting point, and high chemical reactivity. Like the other alkaline earth me
Magnesium is brittle, and fractures along shear bands when its thickness is reduced by only 10% by cold rolling (top). However, after alloying Mg with 1% Al and 0.1% Ca, its thickness could be reduced by 54% using the same process (bottom).
Magnesium sheets and ingots
An Iranian worker tends to the Pidgeon process