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Pebble

A rock fragment between 4 and 64 millimeters (0.16 and 2.51 inches) in diameter, especially one that has been naturally rounded.

It also means a small stone, especially one worn smooth by erosion.

A pebble is a clast of rock with a particle size of 4 to 64 millimeters based on the Krumbein phi scale of sedimentology.

A rock made predominantly of pebbles is termed a conglomerate.

Pebbles are fragile and curious things. Pebble care is usually done by the parent rock.

If you aquire a pebble you must provide it with a surrogate parent until it has reached maturity which is about 4 million years.

Pebbles are like pet rocks, though they have weaker digestive systems.

Feed them dandelion flowers and shamrocks instead of the spinier weeds.