✨ #MineralMonday: Marcasite “Sunburst” ✨
This striking formation of marcasite radiates outward in shimmering, metallic rays, earning its “sunburst” nickname. Though often mistaken for pyrite, marcasite forms in cooler, low-temperature environments, creating these delicate, spiky patterns.
Mineral Monday with a gorgeous 💜 amethyst 💜 chonk (almost 2kilos) from Brazil 🇧🇷 Available…for your collection…or to use in your spell work to hex that jerk of an ex 😉 #crystals #mineralmonday #amethyst #witch #crystalsky
#MineralMonday Kyanite, Barra de Salinas, Minas Gerais, Brazil. 8.8 cm. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
A photo of a mineral specimen. The dark red translucent crystal in the center of the photo is Cinnabar and it is sitting on white rhombohedral crystals of Dolomite. Two clear Quartz crystals are also growing on the Dolomite and can be seen in the top right of the photo and directly beneath the Cinnabar. This specimen is from Hunan Province, China.
Happy #MineralMonday everyone! Today I got for you a excellent Cinnabar crystal on Dolomite with Quartz from Hunan Province, China. Cinnabar is toxic from it's mercury content so it should be stored safely.
White stilbite in the shape of a bow tie shape on a black background with a small white label with 24 on it below it. At the Hunterian.
A bow tie!! This is a classic form of the zeolite mineral stilbite. #MineralMonday #GeoscienceBluesky ⚒️🧪
No #MineralMonday today. Without contributions from people like you, I have nothing to post.
Would you like to feature your research, an neat mineral, a recent publication? Please send information and up to 4 images to akoziol1 at udayton dot edu.
4/ More suggested hashtags to join on a Monday
#AllMetalMonday
#ManholeCoverMonday
#MechanicalMonday
#MopedMonday
#MineralMonday
#MonochromeMonday
#MilitaryMonday
(Architecture Only)
#BrutalMonday
#MondaysAreBrutal
#MinimalistMonday
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#MineralMonday Vanadinite today at The Geologic Column. #geology . No MAGA! Science = Resistance! #standupforscience richardigibson.substack.com/p/vanadinite
A microscope photo of a mineral specimen. The fine white needles are a mineral called Mordenite and it is in a pocket of the mineral Heulandite. Both of these minerals are in the zeolite group. This specimen comes from Skamania County, Washington.
Y'all know what day it is! It's #MineralMonday! Today I got another zeolite mineral for you, a spikey balls of Mordenite!
Mineral Monday:
Rutgers University Faculty and Students Present at the MSA Inaugural Meeting
By Shaunna Morrison
The MSA Inaugural Meeting took place on Feb. 17-19, 2026, in Tucson AZ.
#MSACommunications #MineralMonday #Rutgers #CheMin #zircon #Herkimerdiamonds #GaleCrater #Moon
Specimen of turquoise fluorite carved into an eggs shape on a beige background. At the Natural History Museum in London.
For this holiday Mineral Monday, I present an itty bitty egg shaped from fluorite. #MineralMonday #GeoscienceBluesky ⚒️🧪
4/ More suggested hashtags to join on a Monday
#AllMetalMonday
#ManholeCoverMonday
#MechanicalMonday
#MopedMonday
#MineralMonday
#MonochromeMonday
#MilitaryMonday
(Architecture Only)
#BrutalMonday
#MondaysAreBrutal
#MinimalistMonday
4 of 8 #MondayHashtags
Not the best example for #mineralmonday, but it technically is made of minerals, namely olivine and pyroxene.
Stony meteorite (H-chondrite). Personal find on a dry lakebed.
#minerals #geology #meteorite
Width of specimen: about 7.5 cm
Purchased at a rock shop somewhere, sometime ago.
Here's a Red Cloud Mine wulfenite for #mineralmonday
I am drawn to green rocks/minerals in Spring. As a 5 Element Acupuncturist, it makes perfect sense- green is the color of the Wood element, the energetic of Springtime. Green Grossular Garnets Sierra de Cruces, Coahuila, Mexico. Available. #mineral #mineralmonday #crystal #garnet #crystalsky
#MineralMonday Hemimorphite (zinc silicate) group 3 mm wide in a cavity of and tipped by brown-orange descloizite. Democrat Mine, Lemhi County, Idaho USA. #geology . No MAGA! Science = Resistance! #standupforscience
A microscope photo of a mineral specimen. The central clear tabular hexagonal crystal is Lévyne-Ca. This specimen comes from Grant County, Oregon.
It's #MineralMonday! Today I got a recent acquisition of Lévyne-Ca. I absolutely adore zeolites and this is probably my favorites! This specimen comes from Oregon (I'd love to find some there one day).
Mineral Monday!
Formation of pseudotachylytes by Mattia Pistone
A rock undergoing fracturing (dilatant cracking) and friction melting partially melts at lower temperature than frictional melting alone.
#MSACommunications #MineralMonday #pseudotachylyte #pseudotachylite #partialmelting
Specimen consisting of brown rock with veins of blueish purple opal on a black background. In front is a small transparent plexiglass label that says “Opale/Queensland/Australie” on it. At the Sorbonne.
So not quite a mineral for this week’s Mineral Monday, but this mineraloid opal is such a stunner. #MineralMonday #GeoscienceBluesky ⚒️🧪
crystals of Iodargyrite from australia
A beautiful Iodargyrite for this #MineralMonday, with the simple formula AgI.
Carefully kept away from light, as silver iodide is sensitive to light exposure — a property that was instrumental in the invention of photography.
Well-formed crystals from Australia.
4/ More suggested hashtags to join on a Monday
#AllMetalMonday
#ManholeCoverMonday
#MechanicalMonday
#MineralMonday
#MonochromeMonday
#MilitaryMonday
(Architecture Only)
#BrutalMonday
#MondaysAreBrutal
#MinimalistMonday
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‼️ #MineralMonday ⚒️
A photo of a mineral specimen. The bright green needle-like crystals are Malachite, a hydrous copper carbonate. The Malachite is on a dark grey host rock. This specimen was collected in the Democratic Republic of the Congo.
It's #MineralMonday (and I am fashionably late). Today we have a stunning little specimen of acicular Malachite crystals with such a rich green color. I've recently acquired many more microminerals so they will soon be shared!
Nature said flowers… geology said forever.
Spring is in full formation at the Museum. Can you see the flowers in these rocks? #springbreak #Mineralmonday #dmms
#MineralMonday pyromorphite-mimetite series, var. campylite (from Greek for bent or curved), on yellow-white barite. S'Ortu Becciu Mine, Donori, Sardinia, Italy, about 6 cm across. #geology . No MAGA! Science = Resistance! #standupforscience
Mineral Monday with some beautiful Vera Cruz Amethyst points on a bed of little dog tooth Calcites, Peidra Parada, Veracruz State, Mexico. I love the juxtaposition of the gnarly little gray brown calcites with the regal purple amethyst points🩶💜 #mineralmonday #amethyst #calcite #crystal #minerals
Mineral Monday: Babingtonite in North Carolina
Babingtonite (Ca2Fe2+Fe3+Si5O14(OH) ), an inosilicate, is present as mm-scale crystals lining a fracture from the Caldwell Quarry in Lenoir, NC.
By Chris Tacker, NC State Museum
#MSACommunications #MineralMonday #mineral #babingtonite #northcarolina
Silvery and reddish mica specimen in the shape of a broken star with four points with multiple layers on a black background. At the Canadian Museum of Nature.
Specimen consisting of multiple thin books of pale yellow mica in the shape of stars coming off of matrix in multiple angles. It sits on a plastic wrap in a cardboard tray. At the Canadian Museum of Nature.
Have you ever seen mica in the shape of a star? Muscovite is more commonly seen as books of near hexagonal layers. #MineralMonday #GeoscienceBluesky ⚒️🧪
The Society of Mineral Museum Professionals has just joined Bluesky!!! Happy to join this network for mineral and museum news and geoscience discussions!
#MineralMonday #MuseumMonday
4/ More suggested hashtags to join on a Monday
#AllMetalMonday
#ManholeCoverMonday
#MechanicalMonday
#MineralMonday
#MonochromeMonday
#MilitaryMonday
(Architecture Only)
#BrutalMonday
#MondaysAreBrutal
#MinimalistMonday
4 of 7 #MondayHashtags
