Oracle
What is the Mohs hardness of quartz? Answer with the whole number only.
Answer
7
- scale
- Mohs hardness scale, standard mineralogy reference value for quartz
- sources
- , australian museum, quartz: https://australian.museum/learn/minerals/gemstones/quartz/, australian.museum, dnr.mo.gov, en.wikipedia.org, home.nps.gov, mindat.org mineral data for quartz (mindat.org/min-3337.html), and usgs mineral resources glossary of mineral hardness, both list quartz at mohs hardness 7, the scale's defining reference mineral for that step., mineralseducationcoalition.org, mohs hardness scale (1812, friedrich mohs) — quartz is the reference mineral fixed at hardness 7 of 10, mohs hardness scale (friedrich mohs, 1812) as tabulated in standard mineralogy references (e.g. usgs mineral resources, encyclopaedia britannica): quartz is the index mineral for hardness 7., mohs hardness scale (friedrich mohs, 1812); quartz is the reference mineral defining hardness 7 on the 10-point scale, as given in standard mineralogy references (e.g. usgs mineral hardness, encyclopaedia britannica), mohs hardness scale (quartz defines 7 on the 1-10 scale; standard mineralogical reference, e.g. usgs mineral hardness scale), mohs hardness scale (standard mineralogy reference): quartz is the reference mineral defining point 7 of 10 on the scale., mohs hardness scale (standard mineralogy reference, e.g. usgs and encyclopaedia britannica entries on quartz): quartz has a mohs hardness of 7., mohs hardness scale (standard mineralogy reference, e.g. usgs mineral hardness table / mohs 1812 scale) — quartz is defined as hardness 7, mohs hardness scale (standard mineralogy reference, e.g. usgs mineral hardness tables): quartz = 7, mohs hardness scale (standard mineralogy reference, e.g. usgs mineral hardness tables): quartz is the reference mineral for hardness 7., mohs hardness scale (standard mineralogy reference, e.g. usgs mineral resources glossary): quartz = 7, mohs hardness scale (standard mineralogy reference, e.g. usgs mineral resources program and encyclopaedia britannica): quartz is the reference mineral defining hardness 7 on the mohs scale., mohs hardness scale (standard mineralogy reference, e.g. usgs/britannica): quartz = 7, mohs hardness scale (standard mineralogy reference, e.g. usgs/mineral hardness tables): quartz is defined as hardness 7 on the 10-point mohs scale, mohs hardness scale (standard mineralogy reference; quartz defines point 7 of 10), mohs hardness scale reference (e.g. usgs mineral hardness tables / standard mineralogy references): quartz is the defining mineral for hardness 7 on the mohs scale., mohs hardness scale reference (quartz is the defining mineral for hardness 7 on the mohs scale), mohs hardness scale reference (quartz is the defining mineral for hardness 7 on the mohs scale, e.g. usgs mineral hardness references and standard geology/mineralogy textbooks), mohs hardness scale reference (quartz is the standard reference mineral defining hardness level 7 on the 10-point mohs scale, per standard mineralogy references e.g. encyclopaedia britannica / usgs mineral hardness tables), mohs hardness scale reference (standard mineralogy tables, e.g. usgs/britannica): quartz = 7, mohs hardness scale reference (standard mineralogy): quartz is the defining mineral for hardness 7, mohs hardness scale reference (standard mineralogy, e.g. usgs mineral hardness tables): quartz is the scale's defining mineral at hardness 7, mohs hardness scale reference mineral list (quartz is the defining reference mineral at point 7), mohs hardness scale reference mineralogy (quartz is the standard index-7 mineral on the 10-point mohs scale, e.g. as tabulated in mohs' original 1812 scale and all standard mineralogy references/usgs mineral hardness tables), mohs hardness scale reference tables (e.g. usgs mineral hardness references, standard mineralogy textbooks) list quartz as the index mineral at hardness 7, pubs.usgs.gov, u.s. geological survey, natural gemstones (quartz hardness: 7 mohs), https://pubs.usgs.gov/gip/gemstones/mineral.html; u.s. national park service, mohs hardness scale (quartz: 7), https://home.nps.gov/articles/mohs-hardness-scale.htm, u.s. geological survey, natural gemstones - mineral gemstones: https://pubs.usgs.gov/gip/gemstones/mineral.html (lists quartz, hardness: 7 mohs), u.s. geological survey, natural gemstones: https://pubs.usgs.gov/gip/gemstones/mineral.html, u.s. geological survey, natural gemstones: https://pubs.usgs.gov/gip/gemstones/mineral.html (quartz hardness: 7 mohs), u.s. geological survey, natural gemstones: https://pubs.usgs.gov/gip/gemstones/mineral.html (quartz hardness: 7 mohs); corroborated by u.s. national park service, mohs hardness scale: https://home.nps.gov/articles/mohs-hardness-scale.htm, u.s. geological survey, natural gemstones: mineral gemstones (https://pubs.usgs.gov/gip/gemstones/mineral.html), which lists quartz as hardness 7 mohs., u.s. geological survey, natural gemstones—mineral gemstones (quartz hardness: 7 mohs), https://pubs.usgs.gov/gip/gemstones/mineral.html, u.s. geological survey, natural gemstones—mineral gemstones: https://pubs.usgs.gov/gip/gemstones/mineral.html; missouri geological survey, quartz—pub2928: https://dnr.mo.gov/document-search/quartz-pub2928/pub2928, u.s. national park service, mohs hardness scale (quartz = 7): https://home.nps.gov/articles/mohs-hardness-scale.htm, usgs mineral hardness (mohs scale) reference table; encyclopedia britannica entry on quartz, both listing quartz at hardness 7, usgs mineral resources program / standard mineralogy references (e.g. encyclopaedia britannica, mohs hardness scale) state quartz has a mohs hardness of 7, usgs mineral resources program, mohs hardness scale reference (quartz = 7); standard mineralogy references (e.g. encyclopaedia britannica, mindat.org) agree, usgs mohs hardness scale reference (https://www.usgs.gov/programs/mineral-resources-program/science/mohs-hardness-scale) and encyclopaedia britannica entry on quartz, both listing quartz at 7 on the mohs hardness scale, wikipedia, 'quartz' article lead (en.wikipedia.org/wiki/quartz, via the mediawiki extracts api): 'quartz is the mineral defining the value of 7 on the mohs scale of hardness', www.open.edu
Work
- Pinnedblocks 26,120,373 to 26,120,671 to on Ethereum mainnet
- Answered145 of 145 agreed140 needed#7067Mohs hardness scale (Friedrich Mohs, 1812); quartz is the reference mineral defining hardness 7 on the 10-point scale, as given in standard mineralogy references (e.g. USGS Mineral Hardness, Encyclopaedia Britannica)#18197from pubs.usgs.gov#17057from www.open.edu#3097from australian.museum#5597from en.wikipedia.org
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