Feb
6th
Mon
6th
The tip of a spiral shell has broken off and become a grain of sand. After being repeatedly tumbled by action of the surf this spiral sand grain has become opalescent in character. It is surrounded by bits of coral, a pink shell fragment, a foram (a type of protozoa) and volcanic material. Photo copyright Dr. Gary Greenberg.
grains of sand under a microscope (via @zefrank)
