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The super-eon of time until the start of all known life in the Cambrian era, it is the period covering 4500 to 540 million years ago

Potassium ore used for industrial processed and fertilizer

A calcium-aluminum silicate mineral combined with aggregate and water to form concrete

Rocks and other material formed by volcanic eruption

The entrance to a mine, tunnel or adit

A yellow iron sulphide mineral, FeS2. Referred to as “fool’s gold”

Disseminated copper ore which occurs in fractures and veins in stockwork veins, formed through precipitation of hydrothermal solutions

Pumice is a light-weight, spongy and porous volcanic rock

An igneous rock mass where which larger crystals , called phenocrysts, are set in a finer grains

Processed solid mineral ore in solution