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Pentlandite

Likely the most common nickel bearing ore, Nickel iron sulphide, (Fe,Ni)9S8

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Pick

A T-shaped, hand mining tool which has a wooden or plastic handle fitted in the centre of a steel head with sharp points on either side.

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Pleochroism

The property of a mineral where the colour of grains vary with angle observed

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Plasma

Its own state of matter, apart from gases, solids and liquids with equal amounts of positively and negatively charged particles

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Placer

A deposit containing target minerals such as gold, platinum, diamonds and other gemstone found in loose or loosely compacted soil, sand or gravel