#Tag · bonfire.cafe

This beautiful 213.8 ct elbaite tourmaline has been in the Natural History Museum of Los Angeles County‬'s Gem & Mineral Collection since 1966, purchased from the Martin L. Ehrmann Co., from whom they acquired numerous specimens over the years.

‪@nhm.org‬ #globalmuseum #gems #minerals

Nithin Coca నితిన్

@ncoca@social.coop · 2 months ago

No surprise - #China, alone, is calling for the removal of #minerals from the Just Transition Work Program at #COP30 #climate talks

Well, no surprise to me. The press release from civil society makes the absurd claim that China is "uniquely positioned to champion a just and equitable approach to transition minerals."

Do they really think a authoritarian country, whose #cleantech industry uses #forcedlabor and #landgrabs of #Tibetan and #Uyghur land/bodies will really "champion" justice?

Global Museum

@globalmuseum@mastodon.online · 3 months ago

Massive, naturally formed pyrite cube found in Navajùn, Spain.
📽: Rocks for the Spirit #globalmuseum #minerals #science #rocks

Avispa Mídia

@AvispaMidia@mastodon.social · 3 months ago

⚖️ Trece años después, el conflicto por el proyecto minero Conga revive en los Andes peruanos.
👉 https://avispa.org/?p=121015 🐝

+ en AVISPA.ORG

#extractivismo #mineria #perù #latinoamérica #pueblosindígenas #defensaterritorial #noalaminería #cajamarca #Minerals #protestasperú #resistenciaindigena #protestas #peruanos #mingaindígena #pueblosoriginarios

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https://mastodon.social/tags/mingaind%C3%ADgena

https://mastodon.social/tags/protestasper%C3%BA

https://mastodon.social/tags/noalaminer%C3%ADa

https://mastodon.social/tags/pueblosind%C3%ADgenas

https://mastodon.social/tags/latinoam%C3%A9rica

https://mastodon.social/tags/per%C3%B9

Anke boosted

Claudia Zahn

@Adrenochrome@mastodon.social · 3 months ago

#Aurichalcite (Zn,Cu)5(CO3)2(OH)6
La Maladrerie, Villefranche-de-Rouergue, Villefranche-de-Rouergue, Aveyron, Occitanie, #France, champ 0.6mm
By https://www.mindat.org/photo-1577153.html
#Geology #GeologyPage #Nature #Minerals #Crystals #Gems #Nature #NatureLovers #NaturePhotography #Photographer #RockPorn

Ein unscharfes Nahbild zeigt ein kristallines Objekt auf einem braunen Untergrund. Das Objekt hat eine sternförmige Form und besteht aus mehreren langen, dünnen, flachen Kristallstücken, die von einem zentralen Punkt ausstrahlen. Die Kristallstücke sind von hellblauer Farbe und wirken durchscheinend. Der braune Untergrund ist körnig und uneinheitlich strukturiert. Das Bild ist scharf fokussiert auf das kristalline Objekt, wobei der Hintergrund unscharf ist.

Bereitgestellt von @altbot, privat und lokal generiert mit Gemma3:27b

🌱 Energieverbrauch: 0.095 Wh — Ein unscharfes Nahbild zeigt ein kristallines Objekt auf einem braunen Untergrund. Das Objekt hat eine sternförmige Form und besteht aus mehreren langen, dünnen, flachen Kristallstücken, die von einem zentralen Punkt ausstrahlen. Die Kristallstücke sind von hellblauer Farbe und wirken durchscheinend. Der braune Untergrund ist körnig und uneinheitlich strukturiert. Das Bild ist scharf fokussiert auf das kristalline Objekt, wobei der Hintergrund unscharf ist. Bereitgestellt von @altbot, privat und lokal generiert mit Gemma3:27b 🌱 Energieverbrauch: 0.095 Wh

Claudia Zahn

@Adrenochrome@mastodon.social · 3 months ago

Greg Lloyd boosted

Ele Willoughby, PhD

@minouette@spore.social · 4 months ago

While blue kyanite is used in jewelry, porcelain & pottery glazes, plus gets physics points as an index mineral, it’s the extraordinary ‘reindeer blood’ tenebrescent, & phosphorescent tugtupite “King of Fluorescent Minerals” which is also a gem, gaining both art and physics points for me. #MinCup25

Vote tugtupite in the Mineral Cup 2025 finale here:

https://www.mineralcup.org/2025/vote/r5m01

#scicomm #EarthSci #minerals #tugtupite

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Tugtupite 6.00 ct Oval Cut 15.10 x 9.50 x 6.50 mm The same oval cabuchon is shown under regular light as white and blood red and under UV as scarlet and burgundy, against a black background. Via https://gemologicalcollections.com/product/tugtupite-6-00-ct-oval-cut-15-10-x-9-50-x-6-50-mm-greenland-w399/

Kyanite is a naturally occurring aluminum silicate mineral that typically forms as bladed crystals, and occasionally it occurs as radiating masses of crystals. The name kyanite is derived from the Greek word kyanos which means “blue.” Gem quality kyanite has a royal blue color similar to fine sapphire. This material is highly prized by those who cut gemstones. Kyanite can be cut en cabochon, faceted, or fashioned into beads, however its variability in hardness and color zoning can make it difficult to fashion and facet. Transparent intense blue kyanite is beautiful and is considered to be an exotic gemstone because it is not often seen in jewelry. Kyanite is predominately found in shades of blue and green, but it can also be yellow, white and orange. This 5.87ct gem is an intense deep blue color and the largest and finest kyanite from Nepal in the National Gem Collection. Smithsonian Museum"

The Smithsonian acquired two “ulu” silver pendants with tugtupite cabochons (ulu is an all-purpose knife traditionally used by Inuit, Yupik, and Aleut women), designed and created by Mike Møller. These are the first tugtupite gems acquired for the National Gem Collection. https://naturalhistory.si.edu/object/nmnhmineralsciences_14272125?geogallery=Tugtupite&node=14624I’m

Gorgeous cut red blood tugpite gem from Greenland in the Smithsonian mineral collection

Ele Willoughby, PhD

@minouette@spore.social · 4 months ago

Vote tugtupite in the Mineral Cup 2025 finale here:

https://www.mineralcup.org/2025/vote/r5m01

#scicomm #EarthSci #minerals #tugtupite

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Greg Lloyd boosted

Ele Willoughby, PhD

@minouette@spore.social · 4 months ago

Though kyanite is used in the arts, hematite is the most important pigment left standing, & vital to millennia of art history so easily wins the art vote. Red ochre, earth, Venetian red, mars red & English red. A stable, rich, vibrant red in cave paintings through contemporary paintings! #MinCup25

#TeamHematite

Vote for hematite here: https://www.mineralcup.org/2025/vote/r4m01

#EarhSci #artHist #SciComm #minerals

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Edgar Degas, Portrait of Elena Carafa
ca 1875

Medium: oil
Support: canvas
Size: 70,1 x 55 cm
Art movements: Impressionism, Realism

National Gallery London
NG4167

“The sitter for this portrait, Elena Carafa, was Degas’ first cousin, who lived with her sister Camilla and their mother Stefanina, Duchess Montejasi-Cicerale, in Naples.
The portrait of Elena Carafa by Edgar Degas shows an assured young lady” wearing a black dress and blue shawl, seated back in a floral armchair with red floral wallpaper and white door behind her. She has dark brown hair piled high on her head and looks at the viewer with her chin forward like she’s daring you to judge her.

Uses red ochre (hematite) as a pigment — Edgar Degas, Portrait of Elena Carafa ca 1875 Medium: oil Support: canvas Size: 70,1 x 55 cm Art movements: Impressionism, Realism National Gallery London NG4167 “The sitter for this portrait, Elena Carafa, was Degas’ first cousin, who lived with her sister Camilla and their mother Stefanina, Duchess Montejasi-Cicerale, in Naples. The portrait of Elena Carafa by Edgar Degas shows an assured young lady” wearing a black dress and blue shawl, seated back in a floral armchair with red floral wallpaper and white door behind her. She has dark brown hair piled high on her head and looks at the viewer with her chin forward like she’s daring you to judge her. Uses red ochre (hematite) as a pigment

An image of a cave painting and analysis of pigments used. There’s a rotund beige horse outlined in black from the Lascaux caves, and a collection of squares of browns and black labelled with the mineral pigment used to produce these colours at Lascaux. 6 squares are due to Goethite in umbers and browns. 2 dark browns from Hematite. Black from magnetite. 5 brown squares from: Lepidocrocite, Akaganeite, Maghemite, Feroxyhyte, Ferrihydrite and Fe(III) hydroxy-Sulfate.

Johannes Vermeer, Girl With a Pearl Earring
ca 1665

Medium: Oil
Support: Canvas
Size: 44.5 cm x 39 cm
Art period: Baroque
Mauritshuis, The Hague
Painting

This is the famous painting of the young Dutch woman in gold jacket with white collar, gold and blue turban with large pearl earrings looking over her shoulder at the viewer, against a near-black background.

“Vermeer, Girl with a Pearl Earring is an exceptional example of Vermeer’s genius, it is a portrait of an unknown girl or maybe a generalized female head (called a ‘tronie’ in Netherlands). The pigment analysis revealed a limited palette consisting of red, brown and yellow ochre, natural ultramarine, indigo, lead white, and the rare yellow pigment weld (luteoline).”

Red ochre is hematite.

Via ColourLex — Johannes Vermeer, Girl With a Pearl Earring ca 1665 Medium: Oil Support: Canvas Size: 44.5 cm x 39 cm Art period: Baroque Mauritshuis, The Hague Painting This is the famous painting of the young Dutch woman in gold jacket with white collar, gold and blue turban with large pearl earrings looking over her shoulder at the viewer, against a near-black background. “Vermeer, Girl with a Pearl Earring is an exceptional example of Vermeer’s genius, it is a portrait of an unknown girl or maybe a generalized female head (called a ‘tronie’ in Netherlands). The pigment analysis revealed a limited palette consisting of red, brown and yellow ochre, natural ultramarine, indigo, lead white, and the rare yellow pigment weld (luteoline).” Red ochre is hematite. Via ColourLex

Mineral Cup

Vote in Semifinal 1 — Mineral Cup

Click here to vote in Hematite vs Kyanite Photo credits: John Sobolewski

Ele Willoughby, PhD

@minouette@spore.social · 4 months ago

#TeamHematite

Vote for hematite here: https://www.mineralcup.org/2025/vote/r4m01

#EarhSci #artHist #SciComm #minerals

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Mineral Cup

Vote in Semifinal 1 — Mineral Cup

Click here to vote in Hematite vs Kyanite Photo credits: John Sobolewski

Claudia Zahn

@Adrenochrome@mastodon.social · 4 months ago

Gorgeous #Calcite with #Fluorite and #Quartz From Yaogangxian Mine, Hunan Province, #China..(HWD): 7 X 5 X 3.5 cm

Photo Copyright ©️ Fabian Wildfang
By #GeologyWonders
#Geology #GeologyPage #Nature #Minerals #Crystals #Gems #Nature #NatureLovers #NaturePhotography #Photographer #RockPorn

Claudia Zahn

@Adrenochrome@mastodon.social · 4 months ago

Gorgeous #Calcite with #Fluorite and #Quartz From Yaogangxian Mine, Hunan Province, #China..(HWD): 7 X 5 X 3.5 cm

Photo Copyright ©️ Fabian Wildfang
By #GeologyWonders
#Geology #GeologyPage #Nature #Minerals #Crystals #Gems #Nature #NatureLovers #NaturePhotography #Photographer #RockPorn

Anke boosted

Ele Willoughby, PhD

@minouette@spore.social · 4 months ago

In this battle between pretty blue but very rare gemstones, I am voting Jeremejevite, which is pleochroic with colour changing with viewing angle and piezoelectric, over Haüyne, formed in magma chambers, even though it can fluoresce.

It’s a tough call. Art & physics arguments for both.

#MinCup25 #scicomm #minerals #EarthScience

Vote: https://www.mineralcup.org/2025/vote/r1m03

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Ring in platinum with 2.48 ct. cushion cobalt blue spinel, 0.06 ct. t.w. hauyne, 0.28 ct. t.w. Paraiba tourmaline, and 0.22 ct. t.w. diamonds,
Via https://www.jckonline.com/editorial-article/omi-prive-hauyne/ — Ring in platinum with 2.48 ct. cushion cobalt blue spinel, 0.06 ct. t.w. hauyne, 0.28 ct. t.w. Paraiba tourmaline, and 0.22 ct. t.w. diamonds, Via https://www.jckonline.com/editorial-article/omi-prive-hauyne/

Rare Jeremevite and Alexandrite Ring
lakaka, Madagascar
via https://www.bonhams.com/auction/26600/lot/3037/rare-jeremevite-and-alexandrite-ring/ — Rare Jeremevite and Alexandrite Ring lakaka, Madagascar via https://www.bonhams.com/auction/26600/lot/3037/rare-jeremevite-and-alexandrite-ring/

Ele Willoughby, PhD

@minouette@spore.social · 4 months ago

It’s a tough call. Art & physics arguments for both.

#MinCup25 #scicomm #minerals #EarthScience

Vote: https://www.mineralcup.org/2025/vote/r1m03

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The Japan Times

@thejapantimes@mastodon.social · 5 months ago

The Japanese government is considering launching a think tank to conduct research and analysis and make policy advice on economic security, government officials have said. https://www.japantimes.co.jp/news/2025/09/02/japan/politics/economic-security-think-tank/?utm_medium=Social&utm_source=mastodon #japan #politics #economicsecurity #ai #minerals #chipmakers