An Arenophile (also called Psammophile) is one who collects sand samples.
The interest of the hobby lying in the variety of texture, colour, mineralogy and location of the sand samples.
The word "arenophile" originates in:
The arenophile is thus somebody "which likes sand" ;-)
"To see a world in a grain of sand
and a heaven in a wildflower,
hold infinity in the palm of your hand
and eternity in an hour."