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FRIEDRICH MOHS Photos ❘ Science Photo Library

Hardness Test: Quartz Scratches Calcite
12000056 - Hardness Test: Quartz Scratches Calcite
Hardness Test: Quartz Scratches Calcite
12000055 - Hardness Test: Quartz Scratches Calcite
Moh's Hardness Scale
11577607 - Moh's Hardness Scale
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