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To break up ore by crushing and compaction

A cone shaped or cylindrical deposit of precipitated minerals that develops from a floor or low area upward

A cone shaped or cylindrical deposit of precipitated minerals that develops downward, or hangs from a roof or ceiling

The mineral characteristics which exhibits radial offshooting from the centre or a single point

An isometric gemstone mineral, MgAl2O4

The most common ore of zinc, zinc sulphide ZnS

An isometric platiniferous mineral, PtAs2

A merchantable, nearly pure refined zinc product

The inherent characteristic of a minerals based on having sufficient hardness to strike and mark a mineral of lesser hardness

A general sample, or choice representation of a mineral substance, plant or animal