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@mineralcollection.bsky.social Sep 21, 2026, 5:18 PM

www.mineralcollection.eu/product/2427...
Reyerite from Alit Coir’a’Ghobbhainn, Drynoch, Scotland, UK
24 mm x 20 mm excl. box
11 gram incl. box
€ 25
#reyerite #silicates #phyllosilicates #systematicminerals #thumbnailminerals #micromounts #drynoch #scottishminerals #ukminerals #minerals

@mineralcollection.bsky.social Sep 21, 2026, 5:14 PM

www.mineralcollection.eu/product/2427...
Rhodizite from the Antsirabe II District, Vakinankaratra, Madagascar
6 mm x 4 mm excl. box
5 gram incl. box
€ 8
#rhodizite #borates #heptoborates #systematicminerals #thumbnailminerals #madagascarminerals #minerals #rocks #crystals #stones

@salvaterra.bsky.social Sep 21, 2026, 3:20 PM

round 2, match 3

cuprite VS andalusite final art.

#mincup26 #minerals #sciart

illustration of two minerals competing on the Mineral Cup 2026: cuprite VS andalusite. the first is a small cherry-like crystal piece. the second is a bronze-coloured crystal piece with varied hues.

@salvaterra.bsky.social Sep 21, 2026, 2:11 PM

round 2, march 2

skutterudite VS vesuvianite final art.

#mincup26 #minerals #sciart

illustration of two minerals competing on the Mineral Cup 2026: skutterudite VS vesuvianite. the first is a metal crystal. the second is an olive green crystal.

@salvaterra.bsky.social Sep 21, 2026, 1:17 PM

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.

@mineralcollection.bsky.social Sep 21, 2026, 9:22 AM

www.mineralcollection.eu/product/2426...
Blue chalcedony with calcite from the Mogilata deposit, Septemvri Mine, Bulgaria
4.5 cm x 3 cm
18 gram
€ 12
#chalcedony #calcite #silicates #carbonates #mogilata #septemvri #bulgarianminerals #minerals #rocks #crystals

@foodnourish.bsky.social Sep 21, 2026, 7:51 AM

📣 New Podcast! "Why Seaweed Beats Modern Vegetables" on @Spreaker #algae #diet #digestion #fiber #goiter #health #iodine #kelp #metabolism #minerals #nori #nutrition #oceans #seaweed #superfood #supplements #thyroid #vitamins #wakame #wellness

@mineralmatters.bsky.social Sep 21, 2026, 1:40 AM

Mineral Matters #1187 - Hyalite Opal, Redesdale, Victoria
#minerals #mineralmatters #🧪
mineralmatters.substack.com/p/hyalite-op...

@causticautistic.bsky.social Sep 20, 2026, 6:50 PM

Was going through some old pix and ran across these. I'm a sucker for old museum displays.

#chicago #FieldMuseum #field #museum #displays #geology #minerals #helicites #coquina #marble #geode #crystals #monochrome #blackandwhite #bwphotography #bwphoto #bnw #b&w #photography #photosky

"HELICTITES WYANDOTTE CAVE WYANDOTTE, INDIANA
HELICTITES
THESE ARE SMALL DEPOSITS OCCURRING ON CAVE WALLS ND CEILINGS NLIKE THE STALACTITES AND STALAGMITES. WHICH ARE STRAGHT, HELICTITES BEND IRREGULARLY AND ASSUME THEIR CROOKED FORM AS A RESULT OF THE CHANCE ORIENTATION OF THE CRYSTALS AT THE GROWING END OF THE TUBE."

And there's a chunk of helicites that look like a Renaissance painting of one the circles of hell, a seething mass of body parts.

Coquina
St Augustine, Florida

Coquina (/koʊˈkiːnə/) is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically sorted fragments of mollusks, trilobites, brachiopods, or other invertebrates. The term coquina comes from the Spanish word for "cockle" and "shellfish".

NORMAL FAULT IN MARBLE
THIS BLACK MARBLE WAS ORIGINALLY CROSSED BY A THIN VEIN OF WHITE CALCITE. IT BROKE NEAR THE CENTER AND THE PART AT THE RIGHT SLIPPED DOWN ONE INCH AS IS SHOWN BY THE DISPLACEMENT OF THE SMALL WHITE VEIN. THE FAULT FISSURE WAS LATER FILLED BY A VEIN OF WHITE CALCITE.

And there's a tall rectangular piece of black marble as described.

Geode
Lined with quartz and calcite crystals
Keokuk, Iowa

And there's a geode that's been cut open to reveal.... quartz and calcite crystals.

@mineralcollection.bsky.social Sep 20, 2026, 5:11 PM

www.mineralcollection.eu/product/2426...
Shiny proustite from Bad Schlema, Aue-Bad Schlema, Germany
10 mm x 10 mm excl. stand
3 gram incl. stand
€ 25
#proustite #arsenites #sulfarsenites #systematicminerals #thumbnailminerals #micromount #badschlema #germanminerals #minerals #rocks #crystals #stones

@mineralcollection.bsky.social Sep 20, 2026, 5:09 PM

www.mineralcollection.eu/product/2426...
Yvonite and pushcharovskite from the Salsigne mine (TL), Salsigne, France
20 mm x 10 mm excl. box
5 gram incl. box
€ 30
#yvonite #pushcharovskite #phosphates #systematicminerals #thumbnailminerals #micromount #salsigne #frenchminerals #minerals #crystals

@mineralcollection.bsky.social Sep 20, 2026, 5:06 PM

www.mineralcollection.eu/product/2426...
Rammelsbergite micromount from Jachimov, Karlovy Vary District, Czech Republic
19 mm x 15 mm excl. box
10 gram incl. box
€ 15
#rammelsbergite #metalsulfides #systematicminerals #thumbnailminerals #micromount #jachymov #czechminerals #minerals #rocks #crystals

@gmj-georgia.bsky.social Sep 20, 2026, 11:26 AM

Your body needs vitamin B12 in micrograms but sodium in grams—a 10-million-fold difference that reveals fundamental biochemistry. Understanding nutrient scale … #Micronutrients #Minerals #Nutritionscience #Supplementation #Vitamins #Micronutrients #Minerals #Nutritionscience #Supplementation #V…

@mineralcollection.bsky.social Sep 20, 2026, 8:23 AM

www.mineralcollection.eu/product/2425...
Polished prehnite from the Prospect Quarry, Prospect Hill, NSW, Australia
5 cm x 3.2 cm 2 2 cm excl. box
48 gram incl. box
€ 20
#prehnite #silicates #inosilicates #prospecthill #nswminerals #australianminerals #minerals #rocks #crystals #stones

@mineralcollection.bsky.social Sep 20, 2026, 8:21 AM

www.mineralcollection.eu/product/2425...
Prehnite on matrix from Prospect Hill, Prospect, NSW, Australia
8.5 cm x 7 cm
151 gram
€ 30
#prehnite #silicates #inosilicates #prospecthill #nswminerals #australianminerals #minerals #rocks #crystals #stones

@gmj-georgia.bsky.social Sep 20, 2026, 5:26 AM

Your body stores vitamin B12 for 3–5 years but vitamin C for just 2–3 weeks. Why? Different micronutrients follow completely different tissue storage p… #Biochemistry #Deficiency #Metabolism #Micronutrients #Minerals #Biochemistry #Deficiency #Metabolism #Micronutrients #Minerals https://news.…

@yarnngems.bsky.social Sep 20, 2026, 12:55 AM

CRYSTAL LOVERS: What color do you have the most of in your crystal collection?😍✨️
.
#crystals #minerals #rocks

@mineralmatters.bsky.social Sep 20, 2026, 12:36 AM

Mineral Matters #1186 - Waverley Gem and Mineral Show
#minerals #mineralmatters #🧪
mineralmatters.substack.com/p/waverley-g...

@mineralcollection.bsky.social Sep 19, 2026, 5:56 PM

www.mineralcollection.eu/product/2425...
Petroleum var. bitumen from Sieringhoek, Bad Bentheim, Germany
20 mm x 14 mm excl. Box
5 gram incl. box
€ 15
#bitumen #organiccompounds #sieringhoek #systematicminerals #thumbnailminerals #germanminerals #minerals #rocks #crystals #stones

@mineralcollection.bsky.social Sep 19, 2026, 5:54 PM

www.mineralcollection.eu/product/2425...
Phoenicochroite from the Berezovsk deposit (TL), Beryozovsky, Russia
14 mm x 12 mm excl. box
7 gram incl. box
€ 25
#phoenicochroite #chromates #systematicminerals #thumbnailminerals #typelocality #thumbnailminerals #russianminerals #minerals #rocks