Micrographs (IMAGE)

Virginia Tech

Micrographs

Caption

Scanning electron micrographs of the biological (left) and geological (right) calcite crystals after they were indented with a sharp diamond tip under the same amount of force (0.5 N). Note that the damage pattern in the biological calcite crystals found in the pen shells is highly localized and much smaller than that in geological calcite (approximately 40 μm vs. 100 μm).

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Virginia Tech

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