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@snapcracklepoppies.bsky.socialSep 6, 2026, 2:26 PM

#MinCup26 Round 1 Match 6

New kid is cool and all but I do think SiO2 deserves a shot at a title after all these years 👀

Team #Quartz 💙

@mineralcup.bsky.socialSep 6, 2026, 2:19 PM

It’s a tight #MinCup26 match with just 40 votes separating our contenders and 9 hours left on the clock.

Are you supporting #quartz, a key mineral of childhood (and many adulthood) rock collections, or #asagiite, a newly-discovered oddity hiding in mineshafts?

@erikstrub.bsky.socialSep 6, 2026, 12:56 PM

And, almost forgot, the amethyst color is of course due to charge-transfer effects.

So inorg chemistry, applied chem (silica fuse), solid state physics, nuclear physics, geology, cristallography, mathematics, you could almost think quartz is the holy grail of polymathy. #mincup
#quartz

@mexporg.bsky.socialSep 6, 2026, 12:53 PM

Fresh find of smoky #Quartz in Mt. Blanc Massif, France

#MinCup26 #MinCup #mineral #crystal #mineralogy #mineralexpert

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@microtopico.bsky.socialSep 6, 2026, 12:48 PM

#Quartz is still behind #Asagiite! After ten years and with all these beautiful colors it deserves at least the quarter finals! Vote #quartz!

#MinCup26 👩‍🔬🧪⚒️

Tweezers for scale. Polished quartz samples are arranged in a line with white and clear samples at one end, violet, yellow, and red in the middle and brown and grey ones at the other end.
@vickyveritas.bsky.socialSep 6, 2026, 12:36 PM

An oldie, but a goodie! Vote #quartz. It’s shockingly amazing!

#MinCup26 ⚒️ sci-fi 🧪 🖖🏼 scifi Geosciences #WomenInSTEM geology #geosky #GIS 🍎 🪐 🔭 🌋

@minouette.bsky.socialSep 6, 2026, 12:25 PM

Nice colour asagiite, but it’s no contest. Team #Quartz all the way!

Quartz gets my physics vote as 20% of the Earth’s crust & representative typical elastic moduli, piezoelectricity & its role in clocks, electronics, GPS, computers!

Quartz get art vote for carvings, jewelry & pigments #MinCup26

My mini linocut with quartz crystals and word “Quartz” in script in slate grey. Some of the facets of the crystals are printed onto collaged iridescent translucent paper so they have a pink to pale blue sheen.Rembrandt, Portrait of Margaretha de Geer ca 1661 The pigment analysis revealed a palette consisting of red, orange, and yellow ochres, smalt, bone black, lead white, and carmine cochineal lake. Medium: oil Support: canvas Size: 130.5 x 97.5 cm Art period: Baroque National Gallery London NG1675 Painting in the Rembrandt Database Via ColourLex This is a portrait of an older woman dressed in black with a large lace collar, seated in a substantial chair, holding a handkerchief and looking directly at the viewer, against a dark background. Several pigments have varying amounts of quartz content, but smalt, a pigment with a long history often used, for instance, by Rembrandt is prepared by heating quartz sand, potassium carbonate and a small amount of cobalt (II,III) oxide (Co3O4). Head with cap and beardstraps, perhaps Ptah New Kingdom, Ramesside ca. 1300–1080 BCE Dynasty: Dynasty 19–20 Date: ca. 1300–1080 BCE Geography: From Egypt Medium: Quartz Credit Line: Gift of J. Pierpont Morgan, 1917 Object Number: 17.190.1638 Curatorial Department: Egyptian Art Via The Met This is a small carved ancient Egyptian male head wearing a cap.Double bird pendant Coclé (Macaracas) 950-1100 CE Geography: Panama, Coclé Province, Río Parita region Culture: Coclé (Macaracas) Medium: Gold, rose quartz Dimensions: H. 1 3/4 × W. 1 9/16 × D. 1/2 in. (4.4 × 4 × 1.3 cm) Classification: Metal-Ornaments Credit Line: The Michael C. Rockefeller Memorial Collection, Bequest of Nelson A. Rockefeller, 1979 Object Number: 1979.206.485 Curatorial Department: The Michael C. Rockefeller Wing Via The Met This pendant is two stylized connected birds cast in gold each with a roughly teardrop shape rose quartz pebble at the bottom.
@daverodland.bsky.socialSep 6, 2026, 12:07 PM

How can #quartz be losing to this nobody in round one? Ice, okay, that one I understood, but we at least deserve the angst of quartz v. calcite!

@vickyveritas.bsky.socialSep 6, 2026, 11:48 AM

Well somebody had to do it. Don’t let baby Yoda down. Vote #quartz!

#MinCup26 ⚒️ sci-fi 🧪 🖖🏼 scifi Geosciences #WomenInSTEM geology #geosky #GIS 🍎 🪐 🔭 🌋

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@erikstrub.bsky.socialSep 6, 2026, 8:47 AM

Reposting to boost #quartz #mineralcup
www.mineralcup.org/2026/vote-re...

@mineralcollection.bsky.socialSep 6, 2026, 7:46 AM

www.mineralcollection.eu/product/2411...
Quartz crystals on matrix from Italy
One large crystal is double terminated, the matrix is full with small quartz crystals
10 cm x 6 cm
227 gram
€ 20
#quartz #silicates #italianminerals #minerals #rocks #crystals #stones

@mexporg.bsky.socialSep 6, 2026, 7:23 AM

Common #Quartz can accommodate other minerals, like #Rutile - resulting in variety called "rutilated quartz".

Here are some examples from Brazil and Austrian Alps:

#MinCup26 #MinCup #mineral #crystal #mineralogy #mineralexpert

@microtopico.bsky.socialSep 6, 2026, 7:06 AM

#MinCup26 - #quartz can also preserve fossils.