#biotite

@mineralcollection.bsky.social

4 months ago

www.mineralcollection.eu/product/2096...
#biotite #phyllosilicates #silicates #blinnental #swissminerals #minerals #rocks #crystals #stones

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Sedgwick Museum

@sedgwickmuseum.bsky.social

6 months ago

An igneous rock with a large biotite crystal held in the hand of a Sedgwick Museum staff member. The crystal is so large, it is all you can see from this angle. It is green-back in colour but appears black in the image. Its sheet- like texture can be seen on its surface.

The same rock held at an angle that allows you to see other crystals in it. The other crystals are pink and white I colour. Another angle shows the sheet like texture of biotite from the side. The thin sheet layers can be seen clearly.

Today’s #MineralMonday is Biotite.

Biotite is a silicate mineral which is usually found in igneous or metamorphic rocks and commonly black or dark green in colour. It is a mica mineral which gives it the characteristic property of fracturing into fine, flexible sheets.

#Biotite #SedgwickMuseum

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Samuele Papeschi サムエレパペスキ | Geology is the way ⚒️🧪

@calamitaman.bsky.social

8 months ago

Biotite fish in mylonitic granite.
Island of Elba, Italy

FOV 3 mm

#geology #thinsection #granite #mylonite #micafish #biotite

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@johniac.bsky.social

11 months ago

SciTech Chronicles. . . . . . . . .April 11th, 2025 He'll steal your woman then he'll rob your head.... Vol II No 10 327 links Curated A large phytoplankton bloom in the Subtropical Gyre was...

SciTech Chronicles. . . . . . . . .April 11th, 2025

bit.ly/stc041125

#Volcano #eruption #2018 #"carbon cycle" #waste #RNA #Infections #site-specific #"Lava Creek Tuff" #sanidine #"argon geochronology" #biotite #"monsoon precipitation" #water #energy #availability #"digital twin" #"16TB of data"

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Roope Groot

@roopegroot.bsky.social

11 months ago

Here's a small piece of #biotite rock. Very common, still nice to have it detached from (likely) some pegmatite -also very common here.
I love my #rocks, #minerals, local #geology and such, but remain a curious amateur.

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True&Fiction

@trueandfiction.bsky.social

1 year ago

Definition of biotite Explore the definition of the word "biotite" with example sentences, synonyms, and related terms to improve your English skills.

biotite
- Dark brown to black mica found in igneous and metamorphic rock

Learn More...

#definition #biotite #meaning #english #ielts

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FatherFantaskis

@fatherfantaskis.bsky.social

1 year ago

Translucent sheet of muscovite mica

“Nodular” habit of biotite mica in an unusual granite - yes, granite.

. #MuseuGeologico in #Lisbon is small but perfectly formed. Contrasting exhibits of #biotite and #musovite micas: muscovite as a translucent sheet c 250x250mm, biotite - wait for it - in discrete nodules within an unusual form of granite, which spall off in lumps as they’re weathered out.

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