Auteur : James St. John
Date de publication : Mon, 09 Jun 2025 17:52:34 -0700
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James St. John a posté une photo :

Uraninite rock from the Precambrian of South Afric
Tags : uraninite rock uo2 uranium oxide dioxide oxides mineral minerals radioactive radioactivity radiation witwatersrand supergroup neoarchean archean precambrian south africa
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Auteur : James St. John
Date de publication : Wed, 28 May 2025 11:47:24 -0700
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James St. John a posté une photo :

Amethyst crystal from Maine, USA. (Maine Mineral & Gem M
Tags : deer hill pegmatite sebago pluton oxford field permian intergalactic pit stow maine pegmatites amethyst crystal crystals purple quartz silicon dioxide silicate silicates mineral minerals
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Auteur : James St. John
Date de publication : Tue, 27 May 2025 10:10:40 -0700
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James St. John a posté une photo :

Quartz crystals from Arkansas, USA. (OHS # N4785, Ohio Historical Society collection, on public display at Flint Ridge State Park visitor center, Flint Ridge, Ohio, U
Tags : quartz crystal crystals silicon dioxide silicate silicates mineral minerals hot springs arkansas
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Auteur : James St. John
Date de publication : Tue, 27 May 2025 09:55:59 -0700
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James St. John a posté une photo :

Quartz crystals from Ohio, USA. (OHS # A4397/7, Ohio Historical Society collection, on public display at Flint Ridge State Park visitor center, Flint Ridge,
Tags : quartz silicon dioxide silicate silicates mineral minerals flint ridge ohio
Licence : https://creativecommons.org/licenses/by/2.0/deed.it
Auteur : EU-Ukraine cooperation
Date de publication : Tue, 27 May 2025 00:10:59 -0700
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EU-Ukraine cooperation a posté une photo :

Heavy industrial pollution, environment problem
Tags : air atmosphere belch boiler brick building burn burner business chemical chimney climate cloud clouds coal contamination corporate corporation destruction dioxide dirty electric electricity environmental equipment evaporate evironment fabrication factory fog fuel furnace gas gasoline health heavy hell industrial industry massive modern oil ozone petroleum plant poison pollute polluting pollution produce production sky smog smoke steel toxic work works
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Auteur : James St. John
Date de publication : Mon, 19 May 2025 21:58:05 -0700
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James St. John a posté une photo :

Amethyst from Maine, USA. (Maine Mineral & Gem Museum collection, Bethel, Maine, USA)
A mineral is a naturally-occurring, solid, inorganic,
Tags : amethyst purple quartz silicate silicates mineral minerals silicon dioxide mount megunticook mt camden knox county maine milky
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Auteur : James St. John
Date de publication : Mon, 19 May 2025 21:23:12 -0700
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James St. John a posté une photo :

Quartz after anhydrite from Brazil. (Maine Mineral & Gem Museum collection, Bethel, Maine, USA)
A mineral is a naturall
Tags : quartz after anhydrite pseudomorph pseudomorphs ametista do sul brazil grande state mineral minerals silicon dioxide silicate silicates
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Auteur : James St. John
Date de publication : Mon, 19 May 2025 21:23:12 -0700
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James St. John a posté une photo :

Quartz after anhydrite from Brazil. (Maine Mineral & Gem Museum collection, Bethel, Maine, USA)
A mineral is a naturall
Tags : quartz after anhydrite pseudomorph pseudomorphs ametista do sul brazil grande state mineral minerals silicon dioxide silicate silicates
Licence : https://creativecommons.org/licenses/by/2.0/deed.it
Auteur : James St. John
Date de publication : Mon, 19 May 2025 20:42:20 -0700
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James St. John a posté une photo :

Amethyst from Brazil. (Maine Mineral & Gem Museum collection, Bethel, Maine, USA)
A mineral is a naturally-occurring, solid, inorganic, crystalline
Tags : amethyst purple quartz silicate silicates mineral minerals silicon dioxide ametista do sul brazil rio grande state crystal crystals
Licence : https://creativecommons.org/licenses/by/2.0/deed.it
Auteur : James St. John
Date de publication : Mon, 19 May 2025 20:42:19 -0700
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James St. John a posté une photo :

Amethyst from Brazil. (Maine Mineral & Gem Museum collection, Bethel, Maine, USA)
A mineral is a naturally-occurring, solid, inorganic, crystalline
Tags : amethyst purple quartz silicate silicates mineral minerals silicon dioxide ametista do sul brazil rio grande state crystal crystals
Licence : https://creativecommons.org/licenses/by/2.0/deed.it
Auteur : James St. John
Date de publication : Mon, 19 May 2025 20:42:18 -0700
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James St. John a posté une photo :

Amethyst from Brazil. (Maine Mineral & Gem Museum collection, Bethel, Maine, USA)
A mineral is a naturally-occurring, solid, inorganic, crystalline
Tags : amethyst purple quartz silicate silicates mineral minerals silicon dioxide ametista do sul brazil rio grande state crystal crystals
Licence : https://creativecommons.org/licenses/by/2.0/deed.it
Auteur : James St. John
Date de publication : Mon, 19 May 2025 20:42:18 -0700
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James St. John a posté une photo :

Amethyst from Brazil. (Maine Mineral & Gem Museum collection, Bethel, Maine, USA)
A mineral is a naturally-occurring, solid, inorganic, crystalline
Tags : amethyst purple quartz silicate silicates mineral minerals silicon dioxide ametista do sul brazil rio grande state crystal crystals
Licence : https://creativecommons.org/licenses/by/2.0/deed.it
Auteur : James St. John
Date de publication : Mon, 19 May 2025 20:42:17 -0700
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James St. John a posté une photo :

Amethyst from Brazil. (Maine Mineral & Gem Museum collection, Bethel, Maine, USA)
A mineral is a naturally-occurring, solid, inorganic, crystalline
Tags : amethyst purple quartz silicate silicates mineral minerals silicon dioxide ametista do sul brazil rio grande state
Licence : https://creativecommons.org/licenses/by/2.0/deed.it
Auteur : James St. John
Date de publication : Mon, 19 May 2025 20:42:20 -0700
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James St. John a posté une photo :

Amethyst rimmed by agate from Brazil. (Maine Mineral & Gem Museum collection, Bethel, Maine, USA)
A mineral is a naturally-
Tags : amethyst purple quartz silicate silicates mineral minerals silicon dioxide ametista do sul brazil rio grande state crystal crystals agate
Licence : https://creativecommons.org/licenses/by/2.0/deed.it
Auteur : James St. John
Date de publication : Mon, 19 May 2025 20:20:08 -0700
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James St. John a posté une photo :

Quartz after gypsum from Brazil. (Maine Mineral & Gem Museum collection, Bethel, Maine, USA)
A mineral is a naturally-occurring,
Tags : quartz gypsum ametista do sul rio grande state brazil pseudomorph pseudomorphs crystal crystals silicon dioxide silicate silicates mineral minerals
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Auteur : James St. John
Date de publication : Wed, 14 May 2025 09:03:32 -0700
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James St. John a posté une photo :

Quartz-tourmaline from Switzerland.
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairl
Tags : quartz silicon dioxide silicate silicates mineral minerals crystal crystals cavradi gorge graubunden swiss alps switzerland tourmaline val aulta
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Auteur : James St. John
Date de publication : Wed, 14 May 2025 09:03:31 -0700
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James St. John a posté une photo :

Quartz-tourmaline from Switzerland.
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly
Tags : quartz silicon dioxide silicate silicates mineral minerals crystal crystals cavradi gorge graubunden swiss alps switzerland tourmaline val aulta
Licence : https://creativecommons.org/licenses/by/2.0/deed.it
Auteur : James St. John
Date de publication : Wed, 14 May 2025 09:03:32 -0700
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Description :
James St. John a posté une photo :

Quartz-tourmaline from Switzerland.
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairl
Tags : quartz silicon dioxide silicate silicates mineral minerals crystal crystals cavradi gorge graubunden swiss alps switzerland tourmaline val aulta
Licence : https://creativecommons.org/licenses/by/2.0/deed.it
Auteur : James St. John
Date de publication : Mon, 12 May 2025 14:23:53 -0700
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James St. John a posté une photo :

Amethyst from Bolivia.
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical
Tags : amethyst purple quartz silicon dioxide silicate silicates mineral minerals crystal crystals anahi mine santa cruz bolivia
Licence : https://creativecommons.org/licenses/by/2.0/deed.it
Auteur : James St. John
Date de publication : Mon, 12 May 2025 14:23:50 -0700
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James St. John a posté une photo :

Amethyst from Bolivia.
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical co
Tags : amethyst purple quartz silicon dioxide silicate silicates mineral minerals crystal crystals anahi mine santa cruz bolivia
Licence : https://creativecommons.org/licenses/by/2.0/deed.it