Graphite

Graphite (named by Abraham Gottlob Werner in 1789, from the Greek γραφειν: "to draw/write", for its use in pencils) is one of the allotropes of carbon. Unlike diamond, graphite is a conductor, and can be used, for instance, as the material in the electrodes of an electrical arc lamp.

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Associated minerals include: quartz, calcite, micas, iron meteorites and tourmalines. Notable occurrences include New York and Texas in the USA, Russia, Mexico, Greenland, and India.

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Other characteristics: thin flakes are flexible but inelastic, mineral can leave black marks on hands and paper, conducts electricity, and displays superlubricity. Best field indicators are softness, luster, density and streak.

1789: 1789 was a common year starting on Thursday (see link for calendar)....

Greek: The noun Greek refers to:...

Pencils: REDIRECT Pencil...

Graphite related Images and Photos (experimental)

Inkless Graphite Quill

UFC Walkshort [Graphite]