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scale of hardness

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  • Mohs Scale of Hardness or Mohs Scale —    A scale for classifying stones based on relative hardness, determined by the ability of harder minerals to scratch softer ones. The scale includes the following minerals, in order from softest to hardest …   Glossary of Art Terms

  • Mohs Scale of Hardness — n. Mohs Scale, scale used to classify minerals according to their relative hardness (Mineralogy) …   English contemporary dictionary

  • Hardness of prominent abrasive materials — ▪ Table Hardness of prominent abrasive materials abrasive materials hardness Mohs scale (Mohs hardness) Vickers scale (Vickers hardness) Knoop scale (Knoop hardness) Natural abrasives industrial diamond 10 10,000 8,000 corundum 9 2,200 1,600… …   Universalium

  • Hardness — Hard ness, n. [AS. heardness.] 1. The quality or state of being hard, literally or figuratively. [1913 Webster] The habit of authority also had given his manners some peremptory hardness. Sir W. Scott. [1913 Webster] 2. (Min.) The cohesion of the …   The Collaborative International Dictionary of English

  • Hardness — This article is about mechanical properties of materials. For other uses, see Hard. Hardness is the measure of how resistant solid matter is to various kinds of permanent shape change when a force is applied. Macroscopic hardness is generally… …   Wikipedia

  • hardness — /hahrd nis/, n. 1. the state or quality of being hard: the hardness of ice. 2. a relative degree or extent of this quality: wood of a desirable hardness. 3. that quality in water that is imparted by the presence of dissolved salts, esp. calcium… …   Universalium

  • scale — 1. A standardized test for measuring psychological, personality, or behavioral characteristics. SEE ALSO: score, test. 2. SYN: squama. 3. A small thin plate of horny epithelium, resembling a fish s., cast off from the skin …   Medical dictionary

  • hardness —    a measure of the hardness of a metal or mineral. Hardness is a property easy to appreciate but difficult to quantify and measure.    The Mohs hardness scale is used in geology to give a rough estimate of hardness by testing which minerals are… …   Dictionary of units of measurement

  • Hardness comparison — There are a large number of hardness testing methods available (eg. Vickers, Brinell and Rockwell). Although it is impossible in many cases to give an exact conversion it is possible to give a comparison table. Hardness Comparison Table See also… …   Wikipedia

  • hardness scale — kiečio skalė statusas T sritis fizika atitikmenys: angl. hardness scale vok. Härteskala, f rus. шкала твёрдости, f pranc. échelle de dureté, f …   Fizikos terminų žodynas

  • hardness — 1. The degree of firmness of a solid, as determined by its resistance to deformation, scratching, or abrasion. SEE ALSO: h. scale, number. 2. The relative penetrating power of a beam of x rays, used both within the diagnostic range of …   Medical dictionary

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