For #MineralMonday I offer this Kunzite from the Urucum Mine in Minas Gerais, Brazil. Photographed at the Portland Botanic Gardens.
#RocksOnWalks
#RocksOnWalks
January 13, 2026 at 4:24 AM
For #MineralMonday I offer this Kunzite from the Urucum Mine in Minas Gerais, Brazil. Photographed at the Portland Botanic Gardens.
#RocksOnWalks
#RocksOnWalks
💎 #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.
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
💎 #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.
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.
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
#mineralmonday
January 12, 2026 at 7:01 PM
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
#mineralmonday
#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
#MineralMonday Pyrite concretion, New Albany Shale, American Aggregate Quarry, Indianapolis, Indiana. 3.2 cm.⚒️ #geology . No MAGA! Science = Resistance! #standupforscience
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.
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
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.
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.
Today is going to be a micro #MineralMonday! I have some stunning orange Montgomeryite crystals on fuzzy white balls of Englishite!
January 12, 2026 at 2:16 PM
Today is going to be a micro #MineralMonday! I have some stunning orange Montgomeryite crystals on fuzzy white balls of Englishite!
The beautiful 'flaws' of Amethyst and Smoky Quartz,
through the lens of our digitized museum collections.
#MacroMonday #MineralMonday #DiSSCoEU #DigitalSpecimen #atNHMC
through the lens of our digitized museum collections.
#MacroMonday #MineralMonday #DiSSCoEU #DigitalSpecimen #atNHMC
January 12, 2026 at 2:16 PM
The beautiful 'flaws' of Amethyst and Smoky Quartz,
through the lens of our digitized museum collections.
#MacroMonday #MineralMonday #DiSSCoEU #DigitalSpecimen #atNHMC
through the lens of our digitized museum collections.
#MacroMonday #MineralMonday #DiSSCoEU #DigitalSpecimen #atNHMC
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 ⚒️🧪
January 12, 2026 at 12:41 PM
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 ⚒️🧪
"Tooth" Wulfenite from Mexico on this #MineralMonday !
January 12, 2026 at 10:09 AM
"Tooth" Wulfenite from Mexico on this #MineralMonday !
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...
#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
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...
#MineralMonday #mineral #crystal #mineralogy #mineralexpert #pegmatite #Schorl #Elbaite
mineralexpert.org/article/tour...
For #MineralMonday here is a pretty tourmaline from Coronel Murta, Minas Gerias, Brazil.
I photographed it on a hike in southeastern Germany.
#RocksOnWalks
I photographed it on a hike in southeastern Germany.
#RocksOnWalks
January 6, 2026 at 12:15 AM
For #MineralMonday here is a pretty tourmaline from Coronel Murta, Minas Gerias, Brazil.
I photographed it on a hike in southeastern Germany.
#RocksOnWalks
I photographed it on a hike in southeastern Germany.
#RocksOnWalks
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.
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
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.
Here's a self-collected specimen of azurite and (I think) aurichalcite from the tailings of the Juanita mine at Kelly, New Mexico.
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
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
⛏ #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 (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
January 5, 2026 at 5:26 PM
⛏ #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 (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
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
Happy new #MineralMonday !
Some Franklinite from original mine Franklin in New-Jersey.
Some Franklinite from original mine Franklin in New-Jersey.
Psst... Hey...
It's the first #MineralMonday of 2026! Today I have a specimen of Staurolite showing off it's classic twinning!
It's the first #MineralMonday of 2026! Today I have a specimen of Staurolite showing off it's classic twinning!
January 5, 2026 at 2:41 PM
Psst... Hey...
It's the first #MineralMonday of 2026! Today I have a specimen of Staurolite showing off it's classic twinning!
It's the first #MineralMonday of 2026! Today I have a specimen of Staurolite showing off it's classic twinning!
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 ⚒️🧪
January 5, 2026 at 12:39 PM
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 ⚒️🧪
#MineralMonday ⚒️🧪
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.
January 5, 2026 at 3:50 AM
#MineralMonday ⚒️🧪
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!
December 29, 2025 at 11:32 PM
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!
#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
#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
⚒ #MineralMonday
📷 ~ Amber ~
is fossilized tree resin.
🔎 Fun fact: a "rock" that burns!
The term 'electricity' comes from 'elektron', which is the Greek word for amber.
📍 Beach deposit: Løkken, Jammerbugt, Denmark 🇩🇰
#RockyMonday #geology #geoscience #Denmark #gemstone
📷 ~ Amber ~
is fossilized tree resin.
🔎 Fun fact: a "rock" that burns!
The term 'electricity' comes from 'elektron', which is the Greek word for amber.
📍 Beach deposit: Løkken, Jammerbugt, Denmark 🇩🇰
#RockyMonday #geology #geoscience #Denmark #gemstone
December 29, 2025 at 4:43 PM
⚒ #MineralMonday
📷 ~ Amber ~
is fossilized tree resin.
🔎 Fun fact: a "rock" that burns!
The term 'electricity' comes from 'elektron', which is the Greek word for amber.
📍 Beach deposit: Løkken, Jammerbugt, Denmark 🇩🇰
#RockyMonday #geology #geoscience #Denmark #gemstone
📷 ~ Amber ~
is fossilized tree resin.
🔎 Fun fact: a "rock" that burns!
The term 'electricity' comes from 'elektron', which is the Greek word for amber.
📍 Beach deposit: Løkken, Jammerbugt, Denmark 🇩🇰
#RockyMonday #geology #geoscience #Denmark #gemstone
363 of #365Minerals 🧪⚒️
Annabergite:
- An arsenate mineral
- Forms via the alteration of cobalt and nickel bearing arsenides and sulphides
- Cobalt impurities makes it grey and pink
- Named after Annaberg in Germany, its type locality region #minerals #MineralMonday
Annabergite:
- An arsenate mineral
- Forms via the alteration of cobalt and nickel bearing arsenides and sulphides
- Cobalt impurities makes it grey and pink
- Named after Annaberg in Germany, its type locality region #minerals #MineralMonday
December 29, 2025 at 11:40 AM
363 of #365Minerals 🧪⚒️
Annabergite:
- An arsenate mineral
- Forms via the alteration of cobalt and nickel bearing arsenides and sulphides
- Cobalt impurities makes it grey and pink
- Named after Annaberg in Germany, its type locality region #minerals #MineralMonday
Annabergite:
- An arsenate mineral
- Forms via the alteration of cobalt and nickel bearing arsenides and sulphides
- Cobalt impurities makes it grey and pink
- Named after Annaberg in Germany, its type locality region #minerals #MineralMonday
#MineralMonday
Rocks in road grate; Beaver Island, Lake Michigan.
Rocks in road grate; Beaver Island, Lake Michigan.
December 22, 2025 at 8:51 PM
#MineralMonday
Rocks in road grate; Beaver Island, Lake Michigan.
Rocks in road grate; Beaver Island, Lake Michigan.
#MineralMonday 🎄
Getting coal for Christmas isn’t so bad - coal powered homes, industry, and change for generations.
The tradition? Naughty kids in Europe got coal in their stockings, a warning that made its way to the US in the 19th century. Even the “naughty” got something useful under the tree!
Getting coal for Christmas isn’t so bad - coal powered homes, industry, and change for generations.
The tradition? Naughty kids in Europe got coal in their stockings, a warning that made its way to the US in the 19th century. Even the “naughty” got something useful under the tree!
December 22, 2025 at 8:01 PM
#MineralMonday 🎄
Getting coal for Christmas isn’t so bad - coal powered homes, industry, and change for generations.
The tradition? Naughty kids in Europe got coal in their stockings, a warning that made its way to the US in the 19th century. Even the “naughty” got something useful under the tree!
Getting coal for Christmas isn’t so bad - coal powered homes, industry, and change for generations.
The tradition? Naughty kids in Europe got coal in their stockings, a warning that made its way to the US in the 19th century. Even the “naughty” got something useful under the tree!