Clay Pebble

Clay

Clay is a type of fine-grained natural soil material containing clay minerals. Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide.

Pebble

A pebble is a clast of rock with a particle size of 4–64 mm (0.16–2.52 in) based on the Udden-Wentworth scale of sedimentology. Pebbles are generally considered larger than granules and smaller than cobbles. Pebble tools are among the earliest known man-made artifacts, dating from the Palaeolithic period of human history.

clay

Noun

1. A mineral substance made up of small crystals of silica and alumina, that is ductile when moist; the material of pre-fired ceramics.
2. An earth material with ductile qualities.

Verb

1. To add clay to or to spread clay onto.
2. To purify using clay.

pebble

Noun

1. A small stone, especially one rounded by the action of water.
2. A particle from 4 to 64 mm in diameter, following the Wentworth scale.

Verb

1. To pave with pebbles.
2. To deposit water droplets on the ice.