www.mineralcollection.eu/product/2192...
#atacamite #chrysocolla #halides #oxyhalides #silicates #lafarolamine #mineraleschile #minerals #rocks #crystals #stones

www.mineralcollection.eu/product/2158...
#atacamite #halloysite #oxyhalides #halides #phyllosilicates #silicates #lafarolamine #chileanminerals #minerals #rocks #crystals #stones

Original post on piaille.fr

“But 2,000 years underwater didn’t do the #Antikythera mechanism many favors. Seawater rich with salts and other chemical compounds reacted with the high amount of copper in the bronze mechanism, slowly corroding it and replacing it with a green-hued rock known as #atacamite.” […]

Artistic representation of the magnetic sawtooth structure of atacamite: The magnetic moments (green) of the Cu ions (white and blue) cannot be completely aligned antiparallel to each other due to the triangular arrangement. At low temperatures, this results in the compromise arrangement shown. An external magnetic field destroys it and leads to an unexpectedly strong magnetocaloric effect, which could be used for efficient cooling. Source: B. Schröder/HZDR

Magnetic cooling – using a frustrated desert mineral: Research team from @tu-braunschweig.de and #HZDR identifies #atacamite as a #magnetocaloric material. The results could help to develop new materials for energy-efficient magnetic #cooling.

▶️ www.hzdr.de/presse/atacamite

nappe de cristaux verts d'atacamite

Atacamite, Pérou

youtu.be/XKssYPeM9gM

#atacamite #halogenure #quartz #unique #cristaux #cristal #crystals #mineralogie #mineraux #minerai #gemmes #gems #collection #naturae #lapides #minerals #nature #merveille #cristallisation #collector

www.youtube.com/@naturaelapi...

12月13日

Atacamite [アタカマ鉱]
Lily Mine, Humay District, Pisco Province, Ica, Perui

#鉱物アドベントカレンダー2024
#Bluesky鉱物部
#アタカマ鉱
#Atacamite

"To grow these copper-toothed stomach jaws, which last through the worms’ entire five-year lifespan, bloodworms harvest the metal from marine sediments on the seafloor. Then, through a previously unknown chemical reaction, the worms fuse the copper to their jaws."
#MinCup24 #Atacamite #Bloodworm

Venomous bloodworms grow deadly copper fangs with totally metal trick The worms are known to be highly aggressive and will eat anything they can swallow.

www.livescience.com/bloodworms-f...

I'm pretty sure there were X-Files episodes with a critter like this.
#Atacamite #MinCup24

How bloodworms build their copper teeth - Advanced Science News Scientists uncover how one small protein juggles multiple roles in shaping bloodworms' fang-like copper teeth.

www.advancedsciencenews.com/how-bloodwor...

bloodworm teeth

"a bloodworm’s mouthparts come attached four black jaws that both grip and shoot venom. Around 2 mm in length, the worm’s jaws are a composite of protein, melanin, as well as mineral and ionic copper."

#Atacamite #MinCup

Just 4 hours to push #Atacamite over the edge here, we are trailing, but let's get some #color into the #MinCup2024
Beauty that forms in very harsh conditions? Sign me up.
Similar to #dioptase, so green fans unite!
Used for everything from oil paintings and bloodworm jaws, it's rare, it's hot, vote!

Between #Stibnite and #Atacamite I first thought was, hmmm, which one is weirder looking? As you can see, that got me nowhere! Going with Stibnite because how can I not go with that deep, dark Egyptian eyeliner, though really, can’t go wrong here in this round of #MinCup24.

#atacamite is tempting for the same reason #dioptase won my vote, but I'm ultimately voting #stibnite.

TikTok has been showing me videos from the Denver Gem and Mineral Show and I saw some really cool stibnite pieces!

Round 1 Match 7 — Mineral Cup Stibnite vs Atacamite

If you're still reeling from the defeat of #Copper, now is your chance to keep copper in the running in #MinCup24. Vote for #Atacamite, a copper chloride hydroxide which in some locations can be a minor ore for copper.

Vote #Atacamite! www.mineralcup.org/2024/vote/r1...

#Atacamite crystallizes around seafloor vents, in arid environments, and even sublimates around subaerial volcanic vents. It is also a biomineral 🤩, a natural composite that forms bloodworm jaws.
🧪⚒️ #MinCup24

#Atacamite -used as a green pigment since antiquity on ancient Egyptian paintings, illuminated manuscripts, sculptures, oil paintings or here in ancient Buddhist Kizil Caves in China (3rd-8th century) pulls ahead of #Stibnite -used as kohl as cosmetics since ancient Egypt for my #MinCup24 art vote.

#Stibnite is well known to have been used in cosmetics by the Ancient Egyptians, but so was #Atacamite.

Stibnite has had its chance in past MinCups. It's time to give the green beauty your vote.

Vote Atacamite! www.mineralcup.org/2024/vote/r1...

#MinCup24

Silver Blades jut out from a singular point , radiating in a semicircle from the matrix. The blades vary in thickness and size but that metallic silver sheen is unmistakable

This is the common form of stibinite that I see, which is again, radiating from that central point in this specimin, tiny offshoots weave amongst the pillars.

This is betroydal atacamite. This copper secondary is formed in salty or arid environments. It may alter to malachite and chrysocolla, creating pseudomorphs. It is a gorgeous green color reminding me of yesterday's matchup with dioptase, and they have the same sourcing.

This is crystalline form of atacamite which are radiating spears like the stibinite, but with incredible color and details. Pillows of light green crystals are nestled in clusters around emerald color gems.

#MinCup24 ROUND 1 MATCH 7: #Stibnite vs #Atacamite

Stibnite is a primary source of antimony and used in a ton of applications.

Atacamite is a secondary copper mineral formed through the oxidation of other copper minerals, especially in arid, saline conditions.

www.mineralcup.org/2024/vote/r1...

A photo of the head of the Statue of Liberty

Recognise this? Yes, that's #Atacamite! Atacamite can form as a corrosion product of copper alloys so is found coating many bronze statues including the Statue of Liberty.

Vote Atacamite today! www.mineralcup.org/2024/vote/r1...
#MinCup24 @MineralCup

Image: commons.m.wikimedia.org/wiki/File:St...

Round 1 Match 7 — Mineral Cup Stibnite vs Atacamite

Atacamite has been used as a green-blue pigment in cultural artefacts for millennia and across continents.
#Atacamite wins the art vote for today!

Vote Atacamite today! www.mineralcup.org/2024/vote/r1...
#MinCup24 @MineralCup

Round 1 Match 7 — Mineral Cup Stibnite vs Atacamite

What connects the driest place on Earth, the volcano that smothered Pompeii, and our memorials to the great and good? That's right! It's #Atacamite!

Vote Atacamite today! www.mineralcup.org/2024/vote/r1...
#MinCup24 @mineralcup.bsky.social

I usually vote late in the day so I can see everyone’s interesting #MinCup24 facts and pretty mineral photos, but as an astronomer I think I’m obliged to vote for the one named after the Atacama dessert: home to ALMA, one of the most important telescopes in the world. #Atacamite

On the left, deep blue-green crystals growing in a dense, mossy pattern. On the right, fuzzy white crystals topped with shiny dark grey crystals, together resembling a pile of mechanical pencil lead dropped onto a carpet.

#MinCup24 ROUND 1 MATCH 7: #Stibnite vs #Atacamite

Are you rooting for kohl, responsible for dramatic eyes for eons ? Or do you favour the newcomer found everywhere from the Statue of Liberty to bloodworm jaws?

VOTE: www.mineralcup.org/2024/vote/r1...
RESULTS: www.mineralcup.org/2024/results...