mohs scale: meaning, definition, pronunciation and examples
LowTechnical/Scientific
Quick answer
What does “mohs scale” mean?
A scale from 1 to 10 that measures the hardness of minerals, based on their ability to scratch or be scratched by other minerals.
Audio
Pronunciation
Definition
Meaning and Definition
A scale from 1 to 10 that measures the hardness of minerals, based on their ability to scratch or be scratched by other minerals.
A standard ordinal scale of mineral hardness used in geology, mineralogy, and materials science. The scale is a ranking, not a linear measurement; a mineral with a higher number can scratch any mineral with a lower number.
Dialectal Variation
British vs American Usage
Differences
No significant difference in usage or meaning. Pronunciations are nearly identical, with potential slight vowel differences.
Connotations
Strictly technical and scientific in both varieties.
Frequency
Equally low-frequency and specialized in both regions.
Grammar
How to Use “mohs scale” in a Sentence
[Mineral] has/has a [hardness] of X on the Mohs scale.According to the Mohs scale, [mineral] is a X.[Mineral] ranks X on the Mohs scale.Vocabulary
Collocations
Examples
Examples of “mohs scale” in a Sentence
adjective
British English
- The Mohs-scale value is approximate for many industrial materials.
American English
- The Mohs-scale rating is crucial for assessing gemstone durability.
Usage
Meaning in Context
Business
Rare. May appear in contexts related to mining, jewellery, or industrial abrasives.
Academic
Common in geology, earth sciences, materials science, and engineering textbooks and papers.
Everyday
Very rare. Might be encountered in educational contexts (school science) or hobbyist circles (rock collecting).
Technical
The primary domain of use. Essential terminology in mineralogy and materials testing.
Vocabulary
Synonyms of “mohs scale”
Watch out
Common Mistakes When Using “mohs scale”
- Incorrect: 'It's 7 Mohs scale.' Correct: 'It has a Mohs hardness of 7.' or 'It's a 7 on the Mohs scale.'
- Incorrect capitalisation: 'mohs scale' or 'MOHs scale'. Correct: 'Mohs scale'.
- Treating it as a linear measurement (e.g., 'Diamond is 10 times harder than talc' is false; it's an ordinal scale).
FAQ
Frequently Asked Questions
The scale was devised in 1812 by the German geologist and mineralogist Friedrich Mohs.
No, it is an ordinal scale. The difference in absolute hardness between levels is not uniform. For example, the jump from 9 (corundum) to 10 (diamond) is much greater than from 1 to 2.
1. Talc, 2. Gypsum, 3. Calcite, 4. Fluorite, 5. Apatite, 6. Orthoclase feldspar, 7. Quartz, 8. Topaz, 9. Corundum, 10. Diamond.
Yes, it is often used comparatively for materials like glass, metals, and plastics, though they are assigned comparative values based on which reference mineral they can scratch or be scratched by.
A scale from 1 to 10 that measures the hardness of minerals, based on their ability to scratch or be scratched by other minerals.
Mohs scale is usually technical/scientific in register.
Mohs scale: in British English it is pronounced /ˈməʊz ˌskeɪl/, and in American English it is pronounced /ˈmoʊz ˌskeɪl/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Imagine a MOuse (MO) Hopping on Scale (HS). The mouse starts on talc (soft, 1) and hops up to diamond (hard, 10), scratching each step.
Conceptual Metaphor
HARDNESS IS HIERARCHY (A ladder or ranking system where higher numbers dominate lower ones).
Practice
Quiz
What is the primary principle behind the Mohs scale?