It's not really gemmy, but it's still aquamarine 🩵
Inyo Co., CA. Self-collected from Mesozoic granites.
@geofreelancer.bsky.social
@geofreelancer.bsky.socialIt's not really gemmy, but it's still aquamarine 🩵
Inyo Co., CA. Self-collected from Mesozoic granites.
@richardgibson.bsky.social#MineralMonday Fluorescent calcite on sphalerite, Casapalca Mine, Huarochiri Prov., Peru, largest calcite = 37 mm. Also #EarthScienceWeek2026 #MineralsDay ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
@andersonmineral.bsky.socialIt’s Minerals Day for Earth Science Week so I thought I would share one reason why I adore minerals: the colours!! I love the deep red of this rhodochrosite from N’Chwaning mine, South Africa. #MineralMonday #GeoscienceBluesky #MineralsDay #EarthScienceWeek ⚒️🧪
@mineralsocamerica.bsky.socialMineral Monday!
Minerals Day Around the World
By Fernando Núñez Useche
October 12, 2026 is Minerals Day, part of Earth Science Week. Here we share an educational event taking place in Mexico.
#MSACommunications #MineralMonday #MineralsDay #EarthScienceWeek #education
@daverodland.bsky.socialGood morning butterflies, it's #MineralMonday again! Of quartz, we're still celebrating the winner of #MinCup26!
🧪⚒️💎
@jakooste.bsky.socialOn this #MineralMonday I offer you my latest green aquisitions (and one impostor)
In order: #Demantoid, (Oxy-) #VanadiumDravite, #Arsenopyrite, #Peridot!
@naturaelapides.bsky.socialFor this #MineralMonday, a specimen of andradite featuring beautiful trapezohedral twinned crystals with a matt metallic sheen that would certainly appeal to a car tuning enthusiast.
@tingaringy-pottery.bsky.socialMolybdenite on quartz from Kingsgate, NSW.
Molybdenum can produce tiny square crystals when added to crystaline glazes.
@mineralcollection.bsky.social#MineralMonday
V-twin ferberite from the Tazna Mine, Tasna Rosario, Bolivia
@earthsciweek.bsky.social🔎 #MineralMonday: BISMUTH & BARITE
Our final Mineral Monday before #EarthScienceWeek features two minerals found in cosmetics: #bismuth & #barite!
👉 Explore the #MineralogicalSocietyOfAmerica interactive to learn more: min4kids.org/minerals-your-house
Images: arbyreed & James St. John via Flickr
@daverodland.bsky.socialSomething quick for #MineralMonday, a pretty little beryl (aquamarine, I reckon) I broke out as an exemplar cyclosilicate for lab a couple weeks back. ⚒️🧪💎
@mineralsocamerica.bsky.socialNo #MineralMonday today. Without contributions from people like you, I have nothing to post.
Would you like to feature your research, field photos, a neat mineral, a recent publication? Please send information and up to 4 images to akoziol1 at udayton dot edu.
@catwithrocks.bsky.socialQuick #MineralMonday from me! Have a few hematite included quartz and smoky crystals! Also congratulations to quartz winning the mineral cup!
@andersonmineral.bsky.socialA cute little rhomb of rhodochrosite, a shape you see in other minerals with a similar crystal structure. #MineralMonday #GeoscienceBluesky ⚒️🧪
@naturaelapides.bsky.socialFor this #MineralMonday, I’m continuing to celebrate Quartz’s victory at #MinCup26, and to photograph the quartz specimens in the collection.
Here is a prase flower, a leek-green variety of quartz, with its characteristic slender crystals.
@pharna.bsky.social#BlueSky鉱物部 !
今日は #MineralMonday だよ。
土曜日のマルシェの戦利品、奈留島のハート。
高いイメージがあったからゲット出来ないと思った。
@hizzo.blacksky.appFor this #MineralMonday, have this lovely Azurite on Malachite specimen!
@geofreelancer.bsky.socialI present to you the unassuming (yet funny) clay mineral: Dickite.
A polymorph of kaolinite (Al-silicate hydroxide). Self-collected from Esmeralda Co., NV.
@cambriancam.bsky.socialWelcome back to another #mineralmonday
Here is a cut and polished slab of Banded Fluorite from China. Fluorite can form in hydrothermal veins that carry large amounts of calcium and fluorine. Those veins find open spaces in rocks and eventually cool and crystallize.
@earthsciweek.bsky.social🔎 #MineralMonday: CASSITERITE, the Ore Behind Tin
Cassiterite is the main ore of tin & is used in making solder, electronics, & more!
👉Explore the #MineralogicalSocietyOfAmerica interactive to learn more: min4kids.org/minerals-your-house
Images: Carles Millan, Wikimedia Commons; R. Tanaka, Flickr
