David Hnátek

David Hnátek

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Slída – Wikipedie

Slída – Wikipedie

Naleziště: Příbram

Naleziště: Příbram

Sádrovec, Maroko

Sádrovec, Maroko

azurit z dolu Shilu,provincie Kuang-tung, Čína

Azurite, common in Europe and Asia, is produced by the weathering of copper ore deposits. It was crushed and powdered and used as a pigment from ancient times,

Vzorek magnetitu z italského regionu Trentino-Alto Adige.

Magnetite exposed on the ground. The mineral is black and irregularly smooth. Individual chunks jut at angles characteristic of the crystal habit.

Dolomit Rumunia.jpg

Dolomit Rumunia.jpg

Kalcit ze sbírek Národního muzea v Praze, původem z Čech.

Kalcit ze sbírek Národního muzea v Praze, původem z Čech.

Bauxite.jpg

Bauxite was designated the official state rock of Arkansas in Arkansas has the largest bauxite deposits in the United States (located in Saline County). Bauxite contains aluminum ore, used to make soft drink cans, aluminum foil, and many other products.

Vzorek limonitu

Vzorek limonitu