#corundum — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #corundum, aggregated by home.social.
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#Corundum var. #Ruby
#Afghanistan
Photo by Noor Ullah
By #GeologicalWondersToo / Karen Kemp
#GeologyPage #Nature #Minerals #Crystals #Gems #Nature #NatureLovers #NaturePhotography #Photographer #RockPorn -
Last week Clickspring posted a video showing how to use ruby (synthetic #corundum) bearings in precision instruments.
Corundum bearings are hard (mohs hardness 9) and shaped and polished to be low-friction.
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#arsenuranospathite just because it's neat that so many minerals got together and made this! Even if y'know most of them are danger minerals... that's just more fun. Right?
(Like don't get me wrong, #corundum is neat too. I even own some. But 🤷🏻.)
(Idk what my voting criteria is this year. 🤣) #MinCup24
via @MineralCup
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#MinCup24 ROUND 1 MATCH 2: #Arsenuranospathite vs #Corundum
It's a tough choice, arsenuranospathite's elemental cocktail or corundum's sparkling gem qualities paired with high Mohs hardness? Campaign, learn, share, & VOTE!
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Look,I love #Kyanite, I do. I sang its praises as a thin section superstar, and deep earth origin, but it's gotta be #calcite in this matchup. With #quartz and #corundum out, calcite is the only heavyweight left!
Vote quick. Almost done! But only once.
https://www.mineralcup.org/2023/campaigns/round-3-match-3 -
Jesus motherfucking Christ!
I get busy with work and can't weigh in on #mineralcup23 for one fucking day and fucking #Stibnite Beats #Corundum?
Are you all insane? You might as well choose papyrus font.