#mincup24 — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #mincup24, aggregated by home.social.
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Repost from Adriana Guatame
(@adriguatame.bsky.social):
With #kyanite I always remember this video created by Stacey Phillips via the Mineralogical Society (the LEGO stop motion science videos) -
Perovskite is found just west of Montreal in the Oka Complex; Carbonate-rich, silica-poor magma emplaced in the Cretaceous. The site was mined for niobium in the 1960's and 1970's -it's also enriched in REEs and thorium.
There’s more about perovsite at Oka on MinDat:
https://www.mindat.org/locentries.php?p=14009&m=3166
a non-profit mineral data base founded in 2000 by Jolyon Ralph (who is on Mastodon at @jolyon )#MinCup24 #Perovsite #Oka #Carbonatite #Quebec #Canada #niobium
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As of this round of the #mincup24 vote, I chose #Dioptase over #Wavellite since I own more specimens (obviously, I bought more because I loved it more, for the emerald color and its variety of localities). :blobcatgooglytrash:
Pic1. Mindouli, R. Congo
Pic2. Tsumeb, Namibia
Pic3. Christmas Mine, AZ, USA
Pic4. Kaokoveld, Namibia -
Vote for #Dioptase in this year's #MinCup24 🍀 Now and the next round to come! As said last year as well, dioptase can be stunning. (And I expected the preview to show my pics from last year?)
"pyroelectric, generating an electric charge under heat"
🔥 ⚡ ⚡ ⚡ 🔥
https://retro.pizza/@ElysiaMacht/111092184477376025
Vote here:
https://www.mineralcup.org/2024/vote/r3m2Earlier campaigns this year:
https://www.mineralcup.org/2024/results/r1m06 -
O no what a match-up. Alas for #wavellite, lovely kiwi mineral, arbitrary choice to vote for the one in my collection has me voting for #dioptase. (I think this might be the furthest in dioptase has gotten in the years I've been playing! 👀 ... now watch I just jinxed it. 😆) #MinCup24
via @MineralCup
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Antimony Tin Oxide scatters the wavelengths of infrared light emitted by warm humans. The antimony is often sourced from #stibnite. This material is being used to create fabric infrared invisibility cloaks!
from Jeong et al. (2020) NPG Asia Materials
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Please vote for the beautiful, purple #Charoite in today's #MinCup24. Slightly radioactive ☢️ & weakly fluorescent, and so 'Deep Purple' people first thought it was dyed, we have a pretty unreal 'metal' 🤘 pick to beat boring yellow-brownish topaz. Charoite needs your help!
https://www.mineralcup.org/2024/vote/r2m8
Previous round campaign posts for more charoite info and far better pics:
https://www.mineralcup.org/2024/results/r1m14 -
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#Ringwoodite is a second chance for #Spinel (which lost out to #Vivianite earlier). Ringwoodite has the chemistry of olivine (Mg2SiO4) but the crystal structure of spinel (MgAl2O4).
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Opaque #spinel is the main aluminum-bearing mineral in the Earth's upper mantle. Here surrounded by pale olivine brown orthopyroxene and green clinopyroxene.
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#MinCup24 Round 1 Match 8: #Spinel vs #Vivianite
Spinel makes gems and has some interesting geophysical stories to tell but I have to give the art vote to Vivianite -a pigment in the gorgeous blues of the Pacific NW peoples (including Tshimshian & Haida) & some European medieval, through 18th century paintings, Māori tattoos, Wiru masks from PNG.
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Now live - #MinCup24 Round 1 Match 1: Kaolinite vs. Abelsonite. Not much of a fight if you ask me (#sedimentary bias).
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The non-detection of #perovskite in non-stars shows that it's there.
Cool red dwarf stars have deep absorption bands from TIO gas in their atmospheres. In yet cooler brown dwarfs those bands have disappeared: opaque perovsite dust has condensed, making the titanium invisible.
Spectra from Kesseli et al. (2017), images from Gabicca, LEAP group.
#MinCup24 #Astronomy #RedDwarf #BrownDwarf #L_Dwarf
