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Mohs scale

Pronunciation: moz

Definition: One of two scales measuring the hardness of materials. The original Mohs scale listed 10 sustances of increasing hardness: talc (1), gypsum (2), calcite (3), fluorite (4), apatite (5), orthoclase (6), quartz (7), topaz (8), corundum (9), and diamond (10); the modified Mohs scale lists 15 minerals and is known more commonly as the hardness scale.

See: hardness scale

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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