Category: Other


The tip of a spiral shell has broken off and become a grain of sand. It is opalescent from the repeated tumbling action of the surf. Surrounding the shell fragment are five other sand grains, from top middle clockwise, (1) a pink shell fragment, (2) a foram, (3) a microscopic shell, (4) a volcanic melt, and (5) a bit of coral.

Source: Geology.com (Link has a bunch of different sands and their compositions, really interesting and beautiful!

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Source: Matador

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