If people are going to vote for a novelty mineral over a do-everything classic ( #TeamCalcite ), then it might as well be truly novel. #Putnisite has not only no related minerals, but also no related synthetic materials—and it's only been found in one place on one planet.
#MinCup26
#MinCup26
September 21, 2026 at 7:40 PM
If people are going to vote for a novelty mineral over a do-everything classic ( #TeamCalcite ), then it might as well be truly novel. #Putnisite has not only no related minerals, but also no related synthetic materials—and it's only been found in one place on one planet.
#MinCup26
#MinCup26
It’s the home stretch, #TeamCalcite!
Vote for #Calcite, the only one to produce such a variety of wonders as this delicate little sphere!
www.mineralcup.org/2026/vote-re...
#MinCup26
#MinCup #mineral #crystal
Vote for #Calcite, the only one to produce such a variety of wonders as this delicate little sphere!
www.mineralcup.org/2026/vote-re...
#MinCup26
#MinCup #mineral #crystal
September 11, 2026 at 10:30 PM
It’s the home stretch, #TeamCalcite!
Vote for #Calcite, the only one to produce such a variety of wonders as this delicate little sphere!
www.mineralcup.org/2026/vote-re...
#MinCup26
#MinCup #mineral #crystal
Vote for #Calcite, the only one to produce such a variety of wonders as this delicate little sphere!
www.mineralcup.org/2026/vote-re...
#MinCup26
#MinCup #mineral #crystal
Couple hours to go, friends, and #TeamCalcite needs your votes!
It’s getting real close now …
Vote for calcite just to troll that @crystallised-cricket.com back!
This is the fork in the road moment of #MinCup26 — vote link below!
It’s getting real close now …
Vote for calcite just to troll that @crystallised-cricket.com back!
This is the fork in the road moment of #MinCup26 — vote link below!
September 11, 2026 at 9:55 PM
Couple hours to go, friends, and #TeamCalcite needs your votes!
It’s getting real close now …
Vote for calcite just to troll that @crystallised-cricket.com back!
This is the fork in the road moment of #MinCup26 — vote link below!
It’s getting real close now …
Vote for calcite just to troll that @crystallised-cricket.com back!
This is the fork in the road moment of #MinCup26 — vote link below!
Damn it! I just finished a week of minerals in Earth Science with my 6th graders.
Wish I had known, but we’ll try to jump in next week.
And #TeamCalcite for me.
Wish I had known, but we’ll try to jump in next week.
And #TeamCalcite for me.
September 11, 2026 at 11:40 PM
Damn it! I just finished a week of minerals in Earth Science with my 6th graders.
Wish I had known, but we’ll try to jump in next week.
And #TeamCalcite for me.
Wish I had known, but we’ll try to jump in next week.
And #TeamCalcite for me.
Gem quality fibrous #Calcite from the south of Denmark. The thrill of finding one of these nuggets on the beach is one of my favourite things! Go #TeamCalcite
#MinCup26
#MinCup26
September 11, 2026 at 12:43 PM
Gem quality fibrous #Calcite from the south of Denmark. The thrill of finding one of these nuggets on the beach is one of my favourite things! Go #TeamCalcite
#MinCup26
#MinCup26
Come on, #TeamCalcite!
We’re catching up – let’s not let the wonderful Calcite fall behind.
www.mineralcup.org/2026/vote-re...
A beautiful calcite flower to keep you motivated!
#MinCup26
We’re catching up – let’s not let the wonderful Calcite fall behind.
www.mineralcup.org/2026/vote-re...
A beautiful calcite flower to keep you motivated!
#MinCup26
September 11, 2026 at 10:58 AM
Come on, #TeamCalcite!
We’re catching up – let’s not let the wonderful Calcite fall behind.
www.mineralcup.org/2026/vote-re...
A beautiful calcite flower to keep you motivated!
#MinCup26
We’re catching up – let’s not let the wonderful Calcite fall behind.
www.mineralcup.org/2026/vote-re...
A beautiful calcite flower to keep you motivated!
#MinCup26
If you need any more reasons to vote for #Calcite, just watch this video. #MinCup26 #TeamCalcite ⚒️
bsky.app/profile/spah...
bsky.app/profile/spah...
#TeamCalcite always and forever. Here's a small taste of calcite's beauty with a look at my personal calcite collection.
September 11, 2026 at 8:51 AM
If you need any more reasons to vote for #Calcite, just watch this video. #MinCup26 #TeamCalcite ⚒️
bsky.app/profile/spah...
bsky.app/profile/spah...
Calcite has Iceland Spar, and if you look through it, it refracts so everything is doubled! And it says Vikings used it as a compass and called it a sunstone, which sounds like magic! You can also carve it in its form of alabaster!
GO CALCITE!!!!
#MinCup26
#TeamCalcite
GO CALCITE!!!!
#MinCup26
#TeamCalcite
Come on, #TeamCalcite!
We’re catching up – let’s not let the wonderful Calcite fall behind.
www.mineralcup.org/2026/vote-re...
A beautiful calcite flower to keep you motivated!
#MinCup26
We’re catching up – let’s not let the wonderful Calcite fall behind.
www.mineralcup.org/2026/vote-re...
A beautiful calcite flower to keep you motivated!
#MinCup26
September 11, 2026 at 4:13 PM
Calcite has Iceland Spar, and if you look through it, it refracts so everything is doubled! And it says Vikings used it as a compass and called it a sunstone, which sounds like magic! You can also carve it in its form of alabaster!
GO CALCITE!!!!
#MinCup26
#TeamCalcite
GO CALCITE!!!!
#MinCup26
#TeamCalcite
#MinCup26 Round 1 Match 11
It's a pair of minerals that pull off near-magical tricks with their properties as ubiquitous #Calcite is up against rarity #Julienite.
VOTE: www.mineralcup.org/2026/vote-re...
RESULTS: www.mineralcup.org/2026/vote-re...
It's a pair of minerals that pull off near-magical tricks with their properties as ubiquitous #Calcite is up against rarity #Julienite.
VOTE: www.mineralcup.org/2026/vote-re...
RESULTS: www.mineralcup.org/2026/vote-re...
Vote in Round 1 Match 11 — Mineral Cup & Ore Cup
Vote in Calcite vs Julienite Credit: Harold Moritz and David Hospital
www.mineralcup.org
September 11, 2026 at 7:29 AM
Sad backstory or no, I’m sorry, but it’s Calcite all the way for this paleo gal
#TeamCalcite #Calcite
#TeamCalcite #Calcite
#MinCup26 Round 1 Match 11
It's a pair of minerals that pull off near-magical tricks with their properties as ubiquitous #Calcite is up against rarity #Julienite.
VOTE: www.mineralcup.org/2026/vote-re...
RESULTS: www.mineralcup.org/2026/vote-re...
It's a pair of minerals that pull off near-magical tricks with their properties as ubiquitous #Calcite is up against rarity #Julienite.
VOTE: www.mineralcup.org/2026/vote-re...
RESULTS: www.mineralcup.org/2026/vote-re...
September 11, 2026 at 12:13 PM
Sad backstory or no, I’m sorry, but it’s Calcite all the way for this paleo gal
#TeamCalcite #Calcite
#TeamCalcite #Calcite
C’mon #TeamCalcite!
Let’s smite this Julienite out of the game once and for all!
What even is happening here?!?!?!
If you let @crystallised-cricket.com win this round of #MinCup26 then she’s gonna rub it in for next 12 months …. Go vote for Calcite!
Let’s smite this Julienite out of the game once and for all!
What even is happening here?!?!?!
If you let @crystallised-cricket.com win this round of #MinCup26 then she’s gonna rub it in for next 12 months …. Go vote for Calcite!
September 11, 2026 at 6:49 AM
C’mon #TeamCalcite!
Let’s smite this Julienite out of the game once and for all!
What even is happening here?!?!?!
If you let @crystallised-cricket.com win this round of #MinCup26 then she’s gonna rub it in for next 12 months …. Go vote for Calcite!
Let’s smite this Julienite out of the game once and for all!
What even is happening here?!?!?!
If you let @crystallised-cricket.com win this round of #MinCup26 then she’s gonna rub it in for next 12 months …. Go vote for Calcite!
Time to translate one of my biggest #TeamCalcite #MinCup2026 Threads to Bluesky.
Think calcite only occurs as bland limestone?
It's also an igneous rock in calcite carbonatites! These can host economic deposits of REE and other rare metal ores. The one shown here was mined for Niobium.
Think calcite only occurs as bland limestone?
It's also an igneous rock in calcite carbonatites! These can host economic deposits of REE and other rare metal ores. The one shown here was mined for Niobium.
September 11, 2026 at 8:24 PM
Time to translate one of my biggest #TeamCalcite #MinCup2026 Threads to Bluesky.
Think calcite only occurs as bland limestone?
It's also an igneous rock in calcite carbonatites! These can host economic deposits of REE and other rare metal ores. The one shown here was mined for Niobium.
Think calcite only occurs as bland limestone?
It's also an igneous rock in calcite carbonatites! These can host economic deposits of REE and other rare metal ores. The one shown here was mined for Niobium.
Blocking my eyes & ears & refusing to read julienite propaganda until this match is over because this is calcite's YEAR.
Too many times getting passed over, let's GO #TeamCalcite!
#MinCup26
Too many times getting passed over, let's GO #TeamCalcite!
#MinCup26
#MinCup26 Round 1 Match 11
It's a pair of minerals that pull off near-magical tricks with their properties as ubiquitous #Calcite is up against rarity #Julienite.
VOTE: www.mineralcup.org/2026/vote-re...
RESULTS: www.mineralcup.org/2026/vote-re...
It's a pair of minerals that pull off near-magical tricks with their properties as ubiquitous #Calcite is up against rarity #Julienite.
VOTE: www.mineralcup.org/2026/vote-re...
RESULTS: www.mineralcup.org/2026/vote-re...
Vote in Round 1 Match 11 — Mineral Cup & Ore Cup
Vote in Calcite vs Julienite Credit: Harold Moritz and David Hospital
www.mineralcup.org
September 11, 2026 at 12:25 AM
Blocking my eyes & ears & refusing to read julienite propaganda until this match is over because this is calcite's YEAR.
Too many times getting passed over, let's GO #TeamCalcite!
#MinCup26
Too many times getting passed over, let's GO #TeamCalcite!
#MinCup26
Julienite may change color like Sleeping Beauty's dress.
But calcite is thermoluminescent and sometimes fluorescent. I've always liked calcite, so I'm totally #TeamCalcite. #MinCup #MineralCup2026
But calcite is thermoluminescent and sometimes fluorescent. I've always liked calcite, so I'm totally #TeamCalcite. #MinCup #MineralCup2026
September 11, 2026 at 12:24 AM
Julienite may change color like Sleeping Beauty's dress.
But calcite is thermoluminescent and sometimes fluorescent. I've always liked calcite, so I'm totally #TeamCalcite. #MinCup #MineralCup2026
But calcite is thermoluminescent and sometimes fluorescent. I've always liked calcite, so I'm totally #TeamCalcite. #MinCup #MineralCup2026
No matter how long it’s been since I’ve looked at foraminifera under a microscope:
Always #TeamCalcite
Always #TeamCalcite
Did you slide in your prediction for the #MinCup26 winner?
www.mineralcup.org/2026/vote-re...
You’d think 10 years in, we’d be smooth at this, but nah, been bug-squashing all round.
www.mineralcup.org/2026/vote-re...
You’d think 10 years in, we’d be smooth at this, but nah, been bug-squashing all round.
Vote in the Practice Round — Mineral Cup & Ore Cup
Make you predictions on the ultimate winners for Mineral Cup 2026.
www.mineralcup.org
August 31, 2026 at 6:43 PM
No matter how long it’s been since I’ve looked at foraminifera under a microscope:
Always #TeamCalcite
Always #TeamCalcite
#TeamCalcite keeps the planet from turning into Venus!!
September 28, 2024 at 1:59 AM
#TeamCalcite keeps the planet from turning into Venus!!
Idk, it depends if calcite makes it thru!!! I’m on #TeamCalcite ride-or-die!!!
September 27, 2024 at 11:13 PM
Idk, it depends if calcite makes it thru!!! I’m on #TeamCalcite ride-or-die!!!
Now for a match-up I actually care about! I feared this.
Perovskite is such a potentially important part of our #solarpunk future... but I'm #TeamCalcite through, so there was never really a choice.
Perovskite is such a potentially important part of our #solarpunk future... but I'm #TeamCalcite through, so there was never really a choice.
September 4, 2025 at 6:12 AM
Now for a match-up I actually care about! I feared this.
Perovskite is such a potentially important part of our #solarpunk future... but I'm #TeamCalcite through, so there was never really a choice.
Perovskite is such a potentially important part of our #solarpunk future... but I'm #TeamCalcite through, so there was never really a choice.
August 29, 2025 at 5:17 PM
It's not that I don't like Rhodochrosite; I do. But people, don't let that distract you from the goal tonight - a win for Calcite in this round of #MinCup24. For the foraminifera, for the red algae, for the sea urchins - do it for the urchins!
#TeamCalcite. ⚒️
www.mineralcup.org/2024/vote/r3m3
#TeamCalcite. ⚒️
www.mineralcup.org/2024/vote/r3m3
September 27, 2024 at 8:35 PM
It's not that I don't like Rhodochrosite; I do. But people, don't let that distract you from the goal tonight - a win for Calcite in this round of #MinCup24. For the foraminifera, for the red algae, for the sea urchins - do it for the urchins!
#TeamCalcite. ⚒️
www.mineralcup.org/2024/vote/r3m3
#TeamCalcite. ⚒️
www.mineralcup.org/2024/vote/r3m3
A faithful and painful day in #MinCup24 - the battle of the carbonates: Rhodochrosite vs. Calcite.
One is a sink for calcium, the other for manganese. Both are cool, both are important, but only one of them is a major skeleton-forming mineral.
So it's #TeamCalcite.⚒️
www.mineralcup.org/2024/vote/r3m3
One is a sink for calcium, the other for manganese. Both are cool, both are important, but only one of them is a major skeleton-forming mineral.
So it's #TeamCalcite.⚒️
www.mineralcup.org/2024/vote/r3m3
Vote in MinCup24 R3M3 — Mineral Cup
Rhodochrosite vs Calcite
www.mineralcup.org
September 27, 2024 at 6:34 AM
A faithful and painful day in #MinCup24 - the battle of the carbonates: Rhodochrosite vs. Calcite.
One is a sink for calcium, the other for manganese. Both are cool, both are important, but only one of them is a major skeleton-forming mineral.
So it's #TeamCalcite.⚒️
www.mineralcup.org/2024/vote/r3m3
One is a sink for calcium, the other for manganese. Both are cool, both are important, but only one of them is a major skeleton-forming mineral.
So it's #TeamCalcite.⚒️
www.mineralcup.org/2024/vote/r3m3
People, what is wrong with you?
Why choose a mineral that comes in only one color when you can have a mineral that can come in all colors?
#TeamCalcite ⚒️
Why choose a mineral that comes in only one color when you can have a mineral that can come in all colors?
#TeamCalcite ⚒️
September 23, 2024 at 11:22 AM
People, what is wrong with you?
Why choose a mineral that comes in only one color when you can have a mineral that can come in all colors?
#TeamCalcite ⚒️
Why choose a mineral that comes in only one color when you can have a mineral that can come in all colors?
#TeamCalcite ⚒️
One of the things I really like about Calcite is how weird it is. You see, Calcite can have a variable amount of Mg in it, and that amount varies by rate, but also what else is around, which could lead to some other interactions...
#MinCup24 #TeamCalcite
doi.org/10.1016/j.gc...
#MinCup24 #TeamCalcite
doi.org/10.1016/j.gc...
Redirecting
doi.org
September 23, 2024 at 8:18 AM
One of the things I really like about Calcite is how weird it is. You see, Calcite can have a variable amount of Mg in it, and that amount varies by rate, but also what else is around, which could lead to some other interactions...
#MinCup24 #TeamCalcite
doi.org/10.1016/j.gc...
#MinCup24 #TeamCalcite
doi.org/10.1016/j.gc...
Time for #TeamCalcite to once again bring in the votes as our home team is up against Titanite on #MinCup24. ⚒️
www.mineralcup.org/2024/vote/r2m7
www.mineralcup.org/2024/vote/r2m7
Vote in Round 2 Match 7 — Mineral Cup
Titanite vs Calcite
www.mineralcup.org
September 23, 2024 at 6:23 AM
Time for #TeamCalcite to once again bring in the votes as our home team is up against Titanite on #MinCup24. ⚒️
www.mineralcup.org/2024/vote/r2m7
www.mineralcup.org/2024/vote/r2m7