Mohs scale


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Mohs scale

(mōz),
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.

Mohs scale

A system that qualifies minerals according to hardness, ranging from talc (1) to diamond (15).

Mohs,

Friedrich, German mineralogist, 1773-1839.
Mohs hardness number - a number on a mineralogic scale.
Mohs scale - a qualitative scale in which minerals are classified in order of their increasing hardness. Synonym(s): hardness scale
References in periodicals archive ?
Dispute: The Mohs scale ranks the hardness of minerals--from 1 for softest to 10 for hardest The diamond rates a 10 because it is the hardest mineral on Earth.
(2) The second important flaw in the Mohs scale results from the vastly different intervals between the individual hardness steps.
(3) The third important problem with the Mohs scale was demonstrated in 1831 by M.
Most minerals have a hardness between 2 and 6 on the Mohs scale; most of the harder minerals are anhydrous oxides or silicates.
Due to its hardness (diamond is 10 on the Mohs scale, moissanite 9.25), synthetic production in the laboratory enabled its use for abrasive and cutting machines but in 1987, researchers at North Carolina State University managed to grow silicon carbide for use in the electronics industry.
What is measured on the Mohs scale? What are Grey Dagger, Forester and Footman species of?
What is measured and graded according to the Mohs scale? 5.
What mineral has the lowest number on the Mohs scale? 1.