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A type of rock deriving from clay or silt, also lacking the cleavage distinctive of slate

The process of bombarding matter with energy, creating an excited state of the said matter to facilitate the measurement of reflection and/or absorption of the said energy, thereby determining its mineral constituents from correlative readings. This process is used in X-Ray Fluorescent (XRF) mineral determination

A group of igneous and volcanic rocks between the Atlantic suite and the Pacific suite

A device producing fine mist for the suppression of airborne dust

The number of protons in an atoms nucleus

The smallest particle of an element in the composition of a molecule

Any cut gemstone “en cabochon” that displays a star-like appearance

Any item or instrument from which a price or purpose may be assigned