Our lab added few votes for #dioptase

En el 6to juego de la 2da ronda de #MinCup25 se enfrentan la Dioptasa #Dioptase y la Molibdenita #Molybdenite por un lugar en 4tos de final. Mineral de gema contra mineral de aplicación. ¿Por cuál te inclinás? Votá: www.mineralcup.org/2025/vote/r2... Yo voté Molibdenita

We’re no fools over at Eos. For today’s #MinCup25 matchup, we’re going with brilliant, green dioptase over "fool’s silver" (molybdenite). 📸: Didier Descouens, CC BY 3.0

I might make some version of this joke every year at some point (possibly about the same mineral at one point!) but I’m voting for #dioptase because I too generate an electric charge under heat. #MinCup25

#Molybdenite Dioptase looks nice, but don't touch! Molybdenite's grease is useful, and will live on in your heart, your shirt, the door, the cat and everything else! Vote Molybdenite today!

Different looking dioptase in pictures. Now also with sterling silver itself. ;) bsky.app/profile/elys... Please vote to spread some green to arid deserts! www.mineralcup.org/2025/vote/r2... #MinCup25 #Dioptase Team Moss & Forbidden Broccoli in the post below this:

#MinCup25 -matchen i dag er mellom to mineraler jeg allerede har stemt på, jo? Valget er likevel enkelt, det blir den kandidaten som er så langt ned på Mohs' hardhetsskala at den kan smøres på brødskiva. (Men ikke gjør det, da, i følge snl.no er det nok med 0,3 mg molybden per dag.) #Molybdenite

Although molybdenite is most useful for technical purposes, it’s dioptase that attracts simply by its beauty.

dioptase X molybdenite Whenever possible I vote green 💚 #MinCup25 #minerals #sciart

While molybdenite gets some physics points (source of Re for geochronology, Mo used as a catalyst, battery electrodes, alloys of iron & semiconductors), Dioptase can be made into jewelry & (though a rare pigment) has been on artwork used since Neolithic times so it wins my art vote! 
#MinCup25

#Molybdenite accommodates transition elements, and its isotopes record age. Its transition element chemistry changed after the Great Oxidation Event. Molybdenite recorded the progressive influence of atmospheric O2 on crustal chemistry. #MinCup25

two critical(/strategic) metal-bearing minerals this round!

Molybdenite all the way! Who can resist what I like to think of as fool's silver? #MinCup25

Round 2 gives you another chance to support #Dioptase! It’s blue-green (so credit towards the blue vote this match), a copper mineral (yay) & it’s PYROelectric!! Vote Dioptase!!! #MinCup25

#MinCup25 Round 2 Match 6: It's more exciting versions of familiar favourites as emerald #dioptase is pitted against silvery #molybdenite. Vote: www.mineralcup.org/2025/vote/r2... Results: www.mineralcup.org/2025/results...

Huge battle here in #MinCup25 We have ghostly green space rock #kosmochlor versus the more terrestrial titanium rooted green of #titanite. This is a green battle for the ages and sets up a green battle for the crown. Pics below and vote!

#MinCup25 ⚒️ sci-fi 🧪 🖖🏼 scifi Geosciences #WomenInSTEM geology 🔭🪐

very sad i didn't learn about the Mineral Cup until partway through round 2!!! Gotta go with titanite here even as a space nerd, i'm a sucker for that green #MinCup25

This is a good question. Right now, I have no idea which way to vote this match. #Kosmochlor #Titanite (aka #Sphene) #MinCup25 #Green

Vote for the bright green mineral FROM SPACE! #Kosmochlor #MinCup25

kosmochlor X titanite in the match 4 of the 2nd round. how can someone choose? #MinCup25 #minerals #sciart

While it may be associated with jadeite & hence be carved, it’s a challenge to find sculpture that’s definitely kosmochlor so I’m giving titanite, prized for it’s beauty & a source of the pigment titanium dioxide white since ~1910, the arts vote. On the physics front it boasts trichroism. #MinCup25

while it would be fun to see a possible final between titanite (CaTiSiO₅) and perovskite (CaTiO₃) this realistically isn't going to happen and the very cool, very green kosmochlor deserves to move on

The later rounds of #MinCup25 are always tough calls… After deliberating for a while, I think I gotta go with #Kosmochlor! It’s found in meteorites, and it’s an intense green!! Go vote!

As magma cools, do crystals sink or float? Does viscosity change in the melt? U and REE isotopes in #Titanite record chemical differentiation and age of magmatic melts, important for understanding evolution of Earth’s crust. #MinCup25 sci-fi 🧪 🖖🏼 scifi Geosciences #WomenInSTEM geology 🔭🪐

Gotta go with #titanite for all of the fun reasons, but also because it's a source of titanium dioxide, esp for use as a white pigment. (Not a primary source, but still an important source of TiO2.) #MinCup25

While #Perovskite takes a rest in #MinCup25 I will run a little Marathon... #MaratonBsAs Cheer for me! And for #Perovskite of course 😁

My #MinCup25 watching tonight. Oh, it's 4 a.m. Well. 🤷🏻‍♀️ I enjoyed this video on #Titanite (also called #Sphene). It was actually kind neat to see specimens that are in matrix and with some other crystals as well as the pure titanite. 13.5 mins, ads youtu.be/2VO4whhs-ZI?...

Jaha ja, her har vi to mineraler som begge slo ut mine favoritter i første runde. Men thortveititt rakk jeg jo å bli mye mer intenst fan av enn det som var tilfelle for azuritten, og på det grunnlaget stemmer jeg #kosmochlor i dag. (Pluss at det et et kult navn.) #MinCup25

My vote today goes to the green mineral first found in a meteorite: #kosmochlor. Why? Well, my bachelor thesis was in weathering of the El Hammami meteorite to determine weathering products a meteorite sample can develop once it has hit Earth. Meteorites are so cool and interesting! #MinCup25

All you need to know about underdog #titanite is that it is valued "by extreme gamers as a way to upgrade weapons in Dark Souls." #MinCup25

#Kosmochlor comes from space, #titanite helps preserve my archean fossils. Who to vote for!?

The overlap between #Kosmochlor and Jadeitite and Jadeite is dizzying. Also, #Titanite is a rare accessory of Jadeitite.

We’ve heard it said … titanite is used to help date pink diamonds. #MinCup25 eos.org/articles/con...

Gonna fence sit for a bit this time, but I'm kind of a little obsessed with learning that, despite both mins having names with Greek roots, both "sphene" AND "Titan" may come from Greek substrate words, rather than PIE(though the latter may still be a loan word or PIE).

Voting for kosmochlor as I'd never heard of it before this #MinCup25 and it's a great example showing that substituting a cation can result in a stunning colour change!

Space Green v Progenitor of the Gods green. Still not over #Kosmochlor beating my beloved Azurite, and in the first round no less! It’s going to take some convincing from kosmochlorians to get me not to vote for #Titanite, which tells stories of the early Earth, on the revenge basis alone! #MinCup25

#MinCup25 Round 2 Match 5: We’re going for namesake-minerals as bright meteorite-derived green #kosmochlor is up against the wedge-shaped indicator mineral #titanite.  Vote: www.mineralcup.org/2025/vote/r2... Results: www.mineralcup.org/2025/results...

#MinCup25 #tugtupite The King of Fluorescent Minerals? 🤔 Considering the Inuit myth connected to it, and just a sense of fairness for a change. I’d call it Queen of Fluorescent Minerals. Tenebrescence, fluorescence, and phosphorescence. Very interesting. naturalhistory.si.edu/explore/coll...

Voted yet? Both of these are so very, very weird in the best ways. For the strategic voters, the winner will face off against #perovskite next round.

Tough choice: #carpathite bc I'm an organic chemist #tugtupite bc of tenebrescence (when a mineral changes color after exposure to UV light) Tugtupite from Greenland, left: after exposure to SW-UV; right: the pink color faded after ca. 1 day in its box. (this sample has been stolen 2023 😭)

#MinCup25 #R2M4 It's truly a battle of the UV dynamos. For this match we have two fluorescent beauties facing off in what promises to be a good match. We have #carpathite the very rare hydrocarbon versus #tugtupite the silicate relative of sodalite Battle of the glowing stones Pics below Vote!

#Tugtupite is piezoelectric and only found in a few places on Earth. And the reindeer blood reference should clinch the goth mineral vote. #MinCup25

Closing in, #Tugtupite has a big lead over #Carpathite & no surprise as the “Reindeer Blood” mineral is just incredible. Fluorescent, phosphorescent AND pleochroic, also generating an electric charge under pressure? It’s going to give #Perovskite all it can handle & maybe more next round! #MinCup25

It was hard to pick between these two drop dead gorgeous minerals 🥰 But tugtupite gets my vote purely because it's found with sodalite, and I'm currently working on how to use sodalite as a template for the immobilisation of radioactive waste from futuristic nuclear reactors ☢️ #MinCup25 #Nuclear

I’m backing the underdog, #Carpathite in today’s #MinCup vote: I wasn’t aware that crystalline polycyclic aromatic hydrocarbons existed in nature! PAHs in Antarctic Martian meteorite Allan Hills 84001 were briefly considered as evidence that it once contained microbial life.

As a lifelong horror fan, and a particular fan of Christmas horror, I had to vote for #Tugtupite (Reindeer! Blood!) but I am also a big fan of #Carpathite because 1) pretty! and 2) Carpathians? Horror adjacent! #MinCup25

“Looks like reindeer blood” is creepily specific.

Both minerals are worthy, but I'll be voting for BLOOD ROCK BLOOD ROCK BLOOD ROCKBLOOD ROCK BLOOD ROCK #tugtupite