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The common ore of the metal chromium

The separation of particles by density by spinning the mix of minerals quickly in a cyclone

A halogen element, Symbol, Cl

The era following the Mesozoic Era, known as the Era of Mammals

A tool used to cut or chip rock having chisel-shaped cutting edge at its tip

Any calcined mixtures of clay and limestone, usually mixed with water, and gravel and/or sand

Sampling deposit by the removal of a small chip of material

A void or hole

Microcrystalline to cryptocrystalline sedimentary rock composed of interlocking quartz crystals

The reaction between a metallic ion and a complexing agent, with the resultant ring shaped structure forming a larger particle, useful in the disgorgement and transportation of embedded heavy metals from usually porous substrate