#mineralmonday
LightNews LightNews
richardgibson.bsky.social
#MineralMonday blue fluorite, inclusions of boulangerite, or jamesonite, or stibnite needles, Yaogangxian Mine, Hunan, China. 50 mm.⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
January 19, 2026 at 3:52 PM
catwithrocks.bsky.social
I have used this image as my banner, but never showed it off properly. So for this #MineralMonday, I proudly present this spectacular specimen of Malachite!
Mineral specimen of rich, crystalline Malachite with a green-blue color on the face of a light grey rock.
January 19, 2026 at 3:34 PM
naturaelapides.bsky.social
Native element #MineralMonday !

From Italian volcanoes, the very elemental Siderazot.
A shiny crust of Siderazot found in an italian volcano
January 19, 2026 at 3:08 PM
thammerich.bsky.social
Native element #MineralMonday 🌋

📷 Sulphur

🔎 Liquid sulphur (🟠) and solid sulphur (🟡) deposits.

📍Kawah Ijen, East Java, Indonesia 🇮🇩

#geology #geoscience #travel #RockyMonday #volcanism
Mount Ijen in Indonesia shows unique "liquid sulphur" phenomena where volcanic vents (fumaroles) exhaling sulphur-rich gases: first channeled through pipes, then cooling to form molten red-orange sulphur that solidifies into bright yellow sulphur chunks. Local miners manually break and carry the solid sulphur in heavy loads from the crater upwards the crater rim. ©️ Picture: Thomas Hammerich
January 19, 2026 at 2:51 PM
rootsbelow.bsky.social
For #MineralMonday I offer this Kunzite from the Urucum Mine in Minas Gerais, Brazil. Photographed at the Portland Botanic Gardens.
#RocksOnWalks
January 13, 2026 at 4:24 AM
kenoshamuseums.bsky.social
💎 #MineralMonday 💎

These sparkling crystals are quartz, often called “Herkimer diamonds.” Despite the name, they aren’t diamonds at all—they’re double-terminated quartz crystals known for their exceptional clarity.
January 12, 2026 at 10:10 PM
lynnsylvatica.bsky.social
I prefer extinct plants, but if I had to choose a mineral It’d be fluorite. Especially this honey coloured specimen from Wölsendorf, Germany

#mineralmonday
A hand holding a whiskey-coloured mineral consisting of cubes growing into each other in different angles.
January 12, 2026 at 7:01 PM
richardgibson.bsky.social
#MineralMonday Pyrite concretion, New Albany Shale, American Aggregate Quarry, Indianapolis, Indiana. 3.2 cm.⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
January 12, 2026 at 6:58 PM
mabeeskow.bsky.social
Happy #MineralMonday everybody! ⚒️

Galena is not only the main ore of Pb but also an important host of Ag. It is often associated with sphalerite and forms the characteristic Pb-Zn paragenesis in hydrothermal systems, for example in SEDEX, MVT or Irish-type deposits.
January 12, 2026 at 6:11 PM
catwithrocks.bsky.social
Today is going to be a micro #MineralMonday! I have some stunning orange Montgomeryite crystals on fuzzy white balls of Englishite!
A microscope photos of a mineral specimen. The orange transparent prismatic crystals are Montgomeryite and the fuzzy white spheres with small acicular crystals are Englishite. This specimen is from Custer County, South Dakota.
January 12, 2026 at 2:16 PM
nhmcrete.bsky.social
The beautiful 'flaws' of Amethyst and Smoky Quartz,
through the lens of our digitized museum collections.
#MacroMonday #MineralMonday #DiSSCoEU #DigitalSpecimen #atNHMC
January 12, 2026 at 2:16 PM
gaileygirl.bsky.social
I want one.

#mineralmonday #earthscience

www.earth.com/news/miners-...
Miners discover a 37.4 carat diamond that is half pink and half colorless
A 37-carat diamond, half pink and half colorless, found in Botswana, intrigues scientists due to its two-stage origin and rare purity.
www.earth.com
January 12, 2026 at 2:07 PM
andersonmineral.bsky.social
So this one is bacon adjacent, it looks like wagyu beef 😂. This is the pink variety thulite of the mineral zoisite from Norway. #MineralMonday #GeoscienceBluesky ⚒️🧪
Big block specimen with its front face showing bright pink interspersed with some white crystals, with an outside brown weathered surfaces. It resembles a fatty steak. Some specimens sit in front of rose quartz, rhodonite, and fluorite. At the Great Northern Museum: Hancock.
January 12, 2026 at 12:41 PM
naturaelapides.bsky.social
"Tooth" Wulfenite from Mexico on this #MineralMonday !
"Tooth" Wulfenite from Mexico, bright yellow crystal bi terminated
January 12, 2026 at 10:09 AM
mexporg.bsky.social
Detailed #Tourmaline supergroup overview, including classification, common myths, and many details about these interesting minerals:

#MineralMonday #mineral #crystal #mineralogy #mineralexpert #pegmatite #Schorl #Elbaite

mineralexpert.org/article/tour...
Introduction to Tourmaline Group Minerals
Minerals of the tourmaline supergroup occur in a wide range of colors and form spectacular crystals.
mineralexpert.org
January 12, 2026 at 10:03 AM
rootsbelow.bsky.social
For #MineralMonday here is a pretty tourmaline from Coronel Murta, Minas Gerias, Brazil.
I photographed it on a hike in southeastern Germany.
#RocksOnWalks
January 6, 2026 at 12:15 AM
johnme23.bsky.social
Someone told me it's #MineralMonday.

Here's a self-collected specimen of azurite and (I think) aurichalcite from the tailings of the Juanita mine at Kelly, New Mexico.
January 5, 2026 at 8:07 PM
richardgibson.bsky.social
Non- #MineralMonday Dahllite isn’t a mineral, it’s just carbonate-rich hydroxylapatite. This one is from Wyoming USA. richardigibson.substack.com/p/dahllite ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
Dahllite
Carbonate-rich hydroxylapatite
richardigibson.substack.com
January 5, 2026 at 5:51 PM
thammerich.bsky.social
⛏ #MineralMonday 🌊

📷 Wave Rock (Granite)

🔎 Hyden Rock:
15m/49ft high, 110m/360ft long cliff face. Shaped by weathering & water erosion. Orange+black stains are from lichens, mosses and algae.

⏳ Age: ~2.7 billion years

📍Hyden, WA - #Australia 🇦🇺

#geology #geoscience #travel #RockyMonday
Wave Rock on the left picture side during sunset with blue sky. The Wave Rock is a massive 15-meter-high granite cliff in Western Australia that resembles a colossal ocean wave about to crash. A tree on the right picture side gives reference for size. Picture taken by Thomas Hammerich
January 5, 2026 at 5:26 PM
naturaelapides.bsky.social
Happy new #MineralMonday !
Some Franklinite from original mine Franklin in New-Jersey.
Some Franklinite from original mine Franklin in New-Jersey.
January 5, 2026 at 3:23 PM
catwithrocks.bsky.social
Psst... Hey...
It's the first #MineralMonday of 2026! Today I have a specimen of Staurolite showing off it's classic twinning!
A mineral specimen of several long, dark brown Staurolite crystals in a white matrix. Some of the Staurolite crystals exhibit penetration twinning at 60 degree angle.
January 5, 2026 at 2:41 PM
andersonmineral.bsky.social
First Mineral Monday of the new year!! I love the natural artistry of this scolecite (a mineral in the zeolite group). The careful balance of the three crystal clusters is gorgeous!! #MineralMonday #GeoscienceBluesky ⚒️🧪
Three white clusters of scolecite that are composed of thin crystal bunches that taper to a point. One is vertical and the other two are atan angle to it, one attached at the top of the vertical crystal and one in the middle, forming a point on its left. It is on a frosted plinth in front of a grey background.
January 5, 2026 at 12:39 PM
doktrock.bsky.social
#MineralMonday ⚒️🧪
amnh.org American Museum of Natural History @amnh.org · 15d
For today’s Exhibit of the Day, let’s visit the Tarugo, a dazzling elbaite tourmaline. This gem is one of the finest large crystals ever found. It is notable for its exceptional quality and unique cranberry color.
A close up photo of the Tarugo at the Museum. This elbaite tourmaline gem is a dazzling cranberry color.
January 5, 2026 at 3:50 AM
catwithrocks.bsky.social
Got a spicy specimen this #MineralMonday ! The tabular green crystal is Zeunerite which is altering to Metazeunerite. Zeunerite contains copper, uranium, and arsenic so it is both radioactive and toxic!
Mineral specimen of Zeunerite and Metazeunerite which are the tabular green crystals on the brown matrix. This specimen was collected from Majuba Hill, Pershing Co., Nevada, USA. Zeunerite alters to Metazeunerite through the process of dehydration. Although there is no major visual difference between these minerals, the alteration happens in the chemical structure at the molecular level.
December 29, 2025 at 11:32 PM
richardgibson.bsky.social
#MineralMonday Quartz, Herkimer, New York USA 4.8 cm. Photo at right shows negative crystals in it, about 0.5 mm each. ⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
December 29, 2025 at 4:53 PM