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Photographic gallery.  Thousands of particles under the microscope.

Sponge Spicules

Calcium Carbonate Sponge Spicules

Sponge Spicules Beach Sand From Grand Turk, Caribean Sea Beach Sand From Grand Turk, Caribean Sea

Silica Sponge Spicules

Spongilla lacustris

Spongilla lacustris Spicule Spongilla lacustris Spicule Spongilla lacustris Spicule Spongilla lacustris Spicule Spongilla lacustris Spicule

Ephydatia muelleri

Ephydatia muelleri Spicule

Other Fresh Water Sponges from Lake Washington, Washington State

Freshwater Sponge Spicule Freshwater Sponge Spicule Freshwater Sponge Spicule Freshwater Sponge Spicule Freshwater Sponge Spicule Freshwater Sponge Spicule Freshwater Sponge Spicule Freshwater Sponge Spicule Freshwater Sponge Spicule

Other Fresh Water Sponge Spicules

Freshwater Sponge Spicule Freshwater Sponge Spicule Freshwater Sponge Spicule Freshwater Sponge Spicule Sponge Spicule Sponge Spicule