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obsidianamogno.bsky.social
I LOVE ROCKS
@obsidianamogno.bsky.social
76 followers 92 following 170 posts
(18+) ROCK LOVER! SHE/HER! WRYYYYYAAAA THERE'S SO MUCH LOVE INSIDE OF ME!!!!!!!!!!!!!!!!!!!!!!!!!

HERE'S MY ITCH.IO https://quartzo-fume.itch.io/
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nadwgab.bsky.social
314 of #365Minerals 🧪⚒️

Riebeckite:
- An amphibole group mineral
- Forms in some volcanic rocks and schists
- Blue asbestos (crocidolite) is fibrous riebeckite
- Named after Emil Riebeck (1853-1885), mineralogist and explorer #minerals #MineralMonday
A group of shiny black bladed riebeckite prisms with some orange-brown powdery matrix in between. From Masokani Hill, Kenya. Specimen on display in the Natural History Museum, London. Fibrous masses of bluish-grey riebeckite (variety crocidolite) in a orange-brown quartz matrix. From Mooseck, Austria. Specimen on display in the Natural History Museum, London.
November 10, 2025 at 10:43 AM
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November 9, 2025 at 1:47 PM
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nadwgab.bsky.social
313 of #365Minerals 🧪⚒️

Alunite:
- A sulphate mineral
- A source of aluminium and potassium
- Forms when acid solutions alter potassium-rich volcanic rocks
- Its name comes from the Latin word "alunit" (alum) #minerals
A white compact mass of alunite. From Caden, France. Specimen on display in the Natural History Museum, London. A pale pink massive mass of alunite with some pale orange patches. From Tochihara, Japan. This information is repeated on its display label. Specimen on display in the Natural History Museum, London.
November 9, 2025 at 10:28 AM
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nadwgab.bsky.social
312 of #365Minerals 🧪💎

Phenakite:
- A silicate mineral
- Forms in pegmatite veins and mica-schists
- Sometimes used as a gemstone
- Its name comes from the Greek word "φέναξ/phénax" (deceiver) because it looks like quartz #minerals
A very elongate prism of cream, opaque phenakite. From Kragerø, Norway. Specimen on display in the Natural History Museum, London.
November 8, 2025 at 1:05 PM
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nadwgab.bsky.social
311 of #365Minerals 🧪⚒️

Benstonite:
- A carbonate mineral containing barium
- Fluoresces red under UV and x-rays
- Forms in baryte deposits and in some carbonatites
- Named after Orlando J. Benston (1901-1966) an American ore metallurgist who collected the first specimens #minerals
Clusters of pale beige, translucent benstonite crystals on yellow fluorite. From Cave-in-Rock, Illinois, USA. Specimen on display in the Natural History Museum, London.
November 7, 2025 at 10:02 AM
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nadwgab.bsky.social
310 of #365Minerals 🧪⚒️

Pyrolusite:
- Mineral form of manganese dioxide
- A very common manganese mineral
- An important manganese ore
- Used as a pigment in ancient cave paintings
- Forms in oxidised manganese-bearing hydrothermal deposits #minerals
Radiating groups of jet black to shiny grey acicular pyrolusite crystals. From Tennycape, Nova Scotia, Canada. Specimen on display in the Natural History Museum, London. Radiating groups of jet black to shiny grey acicular pyrolusite crystals. From Eigersburg, Thuringia, Germany Specimen on display in the Natural History Museum, London.
November 6, 2025 at 10:14 AM
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nadwgab.bsky.social
309 of #365Minerals 🧪⚒️

Ruby:
- The red/pink variety of corundum
- Its colour is caused by chromium
- Heat treatment can improve its colour
- 9 on the Mohs hardness scale
- Its name comes from the Latin word "ruber" (red) #minerals
A corundum (var. ruby) crystal mounted on a metal stem like a little lollipop. It has an elongate bipyramidal shape - like a long tube with tapered ends - and is slightly translucent and cherry red in colour. Specimen on display in the Natural History Museum, London. A hexagonal corundum (variety ruby) prism, opaque and reddish-pink in colour. From Sanarka River, Russia. Specimen on display in the Natural History Museum, London. A pale pink corundum (variety ruby) prism embedded in white dolomite. From Campolungo, Switzerland. Specimen on display in the Natural History Museum, London.
November 5, 2025 at 10:41 AM
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nadwgab.bsky.social
308 of #365Minerals 🧪⚒️

Diopside:
- Pyroxene mineral
- Forms in ultramafic igneous rocks, xenoliths & metamorphic rocks
- Can turn into chrysotile when hydrothermally altered
- Name comes from the Greek "dis" (twice) & "òpsè" (face) because its vertical prism can be orientated in two ways #minerals
Pale green diopside prisms with cherry red hessonite crystals. Some of the diopside crystal faces are annotated with crystal face numbers. From Ala, Italy. Specimen on display in the Natural History Museum, London. A chunk of rock with pale green diopside crystals filling its cavity, There's also white, anhedral diopside and some pale brown grossular crystals. From Ala, Italy. Specimen on display in the Natural History Museum, London. A rough pale green and opaque diopside crystal which is slight flattened. It contains some inclusions of brown phlogopite (two patches) and apatite. Label text: Flattened prism with phlogopite. From Perkins, Quebec, Canada. Specimen on display in the Natural History Museum, London. Three translucent diopside gemstones. Left: A rectangular step-cut, pale brownish-green and from an unknown locality. Top right: An oval mixed-cut, green and from Madagascar. Bottom right: A rectangular cut whose colour varies from colourless to green, from an unknown locality. Specimens on display in the Natural History Museum, London.
November 4, 2025 at 11:07 AM
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nadwgab.bsky.social
307 of #365Minerals 🧪⚒️

Hummerite:
- A potassium magnesium vanadate mineral
- Forms via the leaching of vanadium oxide ores
- Named after its type locality Hummer Mine in Paradox Valley, Colorado, USA #minerals #MineralMonday
Orange veins of hummerite, resembling lichen, in grey clay. From Hummer, Colorado, USA. Specimen on display in the Natural History Museum, London.
November 3, 2025 at 12:51 PM
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nadwgab.bsky.social
306 of #365Minerals 🧪⚒️

Leadhillite:
- A carbonate mineral
- Has a high density since it contains lead (~2.5 times more dense than quartz)
- Can be yellow, blue or green
- Forms in the oxidised zone of lead deposits
- Named after Leadhills in Scotland, its type locality #minerals #MineralMonday
Translucent, pale yellow and green leadhillite crystals with some bright blue caledonite on matrix. From Leadhills, Lanarkshire, Scotland, UK. Specimen on display in the Natural History Museum, London.
November 3, 2025 at 12:37 PM
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nadwgab.bsky.social
305 of #365Minerals 🧪⚒️

Sylvanite:
- A telluride mineral
- Contains gold and silver
- Forms in hydrothermal vein deposits
- Named after sylvanium, the obsolete name for the element tellurium. Its name is also partially derived from Transylvania, where it was discovered #minerals #MineralMonday
Bright metallic and platy crystals embedded in grey-white quartz. From Cripple Creek, Teller County, Colorado, USA. Specimen on display in the Natural History Museum, London.
November 3, 2025 at 12:34 PM
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nadwgab.bsky.social
304 of #365Minerals 🧪⚒️

Hematite:
- Very common iron oxide mineral
- Its red powder is used as a pigment
- Forms in a variety of volcanic, sedimentary & metamorphic environments
- Its name comes from the Greek words "αιματίτις λίθος/aematitis lithos" (blood stone) because of its red colour #minerals
A group of tabular, dark metallic-grey hematite crystals on colourless quartz. From Cavradi Gorge, Switzerland. Specimen on display in the Natural History Museum, London. Rusty-red coloured fibrous concentric layers of hematite, resembling a squashed toilet paper roll. From Cleator Moor, Cumbria, England, UK. Specimen on display in the Natural History Museum, London. Masses of black platy hematite crystals with colourless quartz. From Cleator Moor, Cumbria, England, UK. Specimen on display in the Natural History Museum, London.
October 31, 2025 at 11:34 AM
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nadwgab.bsky.social
303 of #365Minerals 🧪⚒️

Glauconite:
- A mica group mineral
- Forms in marine environments
- Turns yellow when oxidised
- The "green earth" pigment is made from glauconite
- Its name comes from the Greek word "γλαυκός/glaukos" (blue-green) because of its colour #minerals
A dull greenish-grey granular mass of glauconite. From Staple Hill, Surrey, England, UK. Specimen on display in the Natural History Museum, London. A small glass dish containing greyish-green grains of glauconite. From Shingle Run, New Jersey, USA. Specimen on display in the Natural History Museum, London.
October 30, 2025 at 10:24 AM
obsidianamogno.bsky.social
woah I have like three of these, they're awesome! I love aluminium
October 29, 2025 at 12:14 PM
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nadwgab.bsky.social
302 of #365Minerals 🧪⚒️

Smoky Quartz:
- A grey to black variety of quartz
- Its colour is due to a combination of Al3+ replacing Si in the crystal lattice and gamma irradiation
- Its colour fades when exposed to UV light and heat
- Forms in igneous rocks #minerals
Double terminated "morion" quartz, which is super black and opaque. From Invercauld, Scotland, UK. Specimen on display in the Natural History Museum, London. Double terminated smoky quartz, dark greyish black in colour and translucent. On a bed of hematite. From Frizington, Cumbria, England, UK. Specimen on display in the Natural History Museum, London.
October 29, 2025 at 10:54 AM
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nadwgab.bsky.social
301 of #365Minerals 🧪⚒️

Kaolinite:
- A clay mineral
- Forms via the weathering of aluminium silicate (e.g. feldspar in granite)
- Used in the production of paper, ceramics, toothpaste, cosmetics...
- Named after its type locality Gaoling, China #minerals
Powdery white kaolinite on rotten granite. From North Goodnbarrow Quarry, Cornwall, England, UK. Specimen on display in the Natural History Museum, London. A smooth pale pinkish-brown chunk of kaolinite. From Westcott, Surrey, England, UK. Specimen on display in the Natural History Museum, London.
October 28, 2025 at 10:26 AM
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nadwgab.bsky.social
300 of #365Minerals 🧪⚒️

Arthurite:
- An arsenate mineral
- Forms in the oxidation zone of copper deposits or via the alteration of arsenopyrite and enargite
- Named after Arthur Kingsbury (1906-1968) & Arthur Russell (1878-1964), two British mineral collectors/mineralogists #minerals #MineralMonday
Clusters of green crystals resembling lichen on a grey quartzite matrix. From Majuba Hill, Pershing County, Nevada, USA. Specimen on display in the Natural History Museum, London.
October 27, 2025 at 10:47 AM