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Photographic gallery.  Thousands of particles under the microscope.
Silica Sponge Spicule

Silica Sponge Spicule

This is from a sand sample collected on a beach in Sorrento Harbor, Italy.

Transmitted Off Crossed Circular Polarized light Illumination

Definition/Function:

Significance in the Environment:

Characteristic Features:

Associated Particles:

References: