No Comments

Placer

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

No Comments

Pipe

A vertical body of rock formed from lava and debris moving directly upward

No Comments

Pore

A vacant space, hole or cavity in rock or soil

No Comments

Porcelain clay

A clay substance, such as kaolinite, suitable for use in the manufacture of porcelain

No Comments

Polymer

A compound comprised of two or more bonded molecules of the same simple substance