#MinCup26 is an active hashtag on Bluesky. In the last 30 days, 165 people shared 1,210 posts with it — around 40 a day. Activity is down 25% versus the previous week, peaking on Sep 6 with 141 posts.

Posts with #MinCup26

Vicky Veritas

@vickyveritas.bsky.social

4 days ago

Also known as “Cobalt Bloom,” #erythrite forms from the weathering of other cobalt-bearing minerals. Typically found in the oxidized zone of cobalt-nickel-arsenic ☠️ deposits. Link in ALT! #MinCup26 ⚒️ sci-fi 🧪 🖖🏼 scifi Geosciences #WomenInSTEM geology #geosky #GIS 🍎 🪐 🔭 🌋 📚 🌿

Incredible translucent cranberry Erythrite bladed crystals. Credit: ShelterRockMinerals From: https://www.geologyin.com/2017/06/incredible-erythrite-crystals-from.html

5 36 206

Mineral Cup & Ore Cup

@mineralcup.bsky.social

2 days ago

#MinCup26 Round 2 Match 4 Both colourful yet opposite in almost every other way, it’s abundant and hard #Quartz against rare and very soft #Stichtite. VOTE: www.mineralcup.org/2026/v…. RESULTS: www.mineralcup.org/2026/v….

17 43 97

Mineral Cup & Ore Cup

@mineralcup.bsky.social

about 23 hours ago

#MinCup26 Round 2 Match 5 It's a pair or rare, vibrant minerals with unusual chemistry as purple #Putnisite is up against blue #Julienite. VOTE: www.mineralcup.org/2026/v…. RESULTS: www.mineralcup.org/2026/v….

Split photo of tiny grape-jello purple cubical crystals with a rough surface. The crystals are poking out of a massive rough rock with areas of fuzzy green and broad purple, all with a grainy coating of white as though it were rubbed with flour. The other photo is saturated cobalt blue needle-line crystals in a narrow fan sparkly and rough on a smooth creamy background

8 35 86

Mineral Cup & Ore Cup

@mineralcup.bsky.social

3 days ago

#MinCup26 Round 2 Match 3: It's a shiny showdown as soft copper-rich #Cuprite is up against the multicoloured index mineral #Andalusite. VOTE: www.mineralcup.org/2026/v…. RESULTS: www.mineralcup.org/2026/v….

Split image of a pair of candy-looking translucent minerals. On one side is the geometric pointed tip of cherry-red cuprite, on the other is a rough bar of peachy andalusite embedded in a white grainy matrix.

5 43 102

Mineral Cup & Ore Cup

@mineralcup.bsky.social

5 days ago

#MinCup26 Round 2 Match 1: It’s a visually-striking start to Round 2 as deep blue pigment #Azurite is against lead- and zinc-rich #Sphalerite. VOTE: www.mineralcup.org/2026/v…. RESULTS: www.mineralcup.org/2026/v….

Split photo with deep blue translucent crystals jut upwards in a cluster like modern skyscrapers on the left. They have lightly striated faces, and are long with pointed tips. On the right is a metallic grey triangular crystal with deeply striated faces. The face itself is geometrically broken with jagged edges, evoking a cyberpunk-futuristic vibe.

13 58 137

Mineral Cup & Ore Cup

@mineralcup.bsky.social

4 days ago

#MinCup26 Round 2 Match 2 It’s a match of opposites as heavy metal toxic #Skutterudite is up against the colourful sparkly aluminum silicate jewelry gem #Vesuvianite. VOTE: www.mineralcup.org/2026/v…. RESULTS: www.mineralcup.org/2026/v….

Split photo of the pointy end of a rough, geometric metallic crystal and a translucent yellow striated tower with a blunt top

12 51 101

Vicky Veritas

@vickyveritas.bsky.social

5 days ago

‘Sphalerite, when found in gem-quality crystals exhibits a dispersion three times higher than that of diamond. This high dispersion means that light entering the stone is split into a rainbow of colors.” 👀 ALT #MinCup26 ⚒️ sci-fi 🧪 🖖🏼 scifi Geosciences #WomenInSTEM geology #geosky #GIS 🍎 🪐 🔭 🌋 📚 🌿

Rainbow Sphalerite From: From: https://gemheaven.org/article/sphalerite/

3 19 125

Kerstin Neuhaus

@microtopico.bsky.social

1 day ago

This is Rose Quartz. It gets its color from microscopic inclusions of Dumortierite, which is rosy because of its iron and titanium content. It is very common, but there is another rosy variation of quartz that is much less common and also receives its color in another way: #MinCup26

This is Rose Quartz. The crystals are rosy, but not really clear, but mainly only translucent.

2 9 65

Kerstin Neuhaus

@microtopico.bsky.social

1 day ago

I decided to be a #Quartz Fan Account this year. Huge crystals, so many colors and so many useful applications 🥰 #MinCup26

A large clear Quartz crystal found in the collection of the Institute of Mineralogy in Münster.

Violet amethyst and small white, idiomorphic Quartz crystal.

Two rosy, idiomorphic Quartz crystals I found in the Sauerland region in Germany.

A large, slightly yellowish Quartz crystal found in the collection of the Institute of Mineralogy in Münster

1 10 64

Fernando Salvaterra

@salvaterra.bsky.social

3 days ago

All the minerals from the mineral cup 2025. They are now uploaded as high-res PNG files as stock art here: 💎 salvaterra.itch.io/minera…. #mincup #mincup25 #mincup26 #minerals #sciart #bsnm

a poster with 32 colourful illustrations of mineral pieces from the set of contenders in the mineral cup 2025. the minerals are such as calcite, haüyne, silver, hematite, tugtupite, kyanite, wavelite, etc. some are green, some are blue, golden, grey, white, in a wide variety of shades and hues.

1 21 68

Fernando Salvaterra

@salvaterra.bsky.social

about 10 hours ago

round 2, march 1 azurite VS sphalerite final art. we are late but we still run let's go. #mincup26 #minerals #sciart

illustration of two minerals competing on the Mineral Cup 2026: azurite VS sphalerite. The first is a deep blue crystal and the second one looks like lead.

1 5 48

Mineral Cup & Ore Cup

@mineralcup.bsky.social

6 days ago

#MinCup26 Round 1 Match 16 It's a pair of industrially-vital minerals for the final match of the first round as tin ore #Cassiterite is up against elemental carbon #Graphite. VOTE: www.mineralcup.org/2026/v…. RESULTS: www.mineralcup.org/2026/v….