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Photographic gallery.  Thousands of particles under the microscope.

Casting Sand

Transmitted Off Crossed Circular Polarized Light Illumination

Sand is a large accumulation of small rock and/or mineral particles in the size range of from 20 micrometers to 2,000 micrometers in diameter. Sand may include small shells or shell fragments and oolitic deposits. Sand is a size and density segregated material that is the result of air or water action.

Significance in the Environment:

Characteristic Features:

Associated Particles: