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Oh, schist! Another metamorphic petrology practical class.

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Garnets are my favorite mineral! Here are some pictures of a garnet crystal in microscope thin-section. Many varieties of garnets are dodecahedral, like naturally forming dice. This sample had been altered, so the crystal grains are somewhat deformed, thus the less distinct edges of this garnet crystal.

Garnet in PPL (Plane Polarized Light): slightly yellow, distinct shape.

Garnet in XPL (Cross Polarized Light): extinct (opaque) at all angles of rotation.

Garnet in XPL + gypsum filter: funky town.

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Recently I've been a bit unmotivated with my geology major, but metamorphic petrology is here to cheer me up

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Some ornamental rocks found in the Historic Downtown São Paulo

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Omg thank you for tagging me @therat143!

@therat143 @imfallingthroughtime @kaffeegottin @caffeinateddiscoverer @casperwyomingxer @gottalottarocks @cerussa

favirote moots?

(People you tag have to reblog and say their favorite moots)

Okay wait

@ibrokeurheartbcuzubrokemine @foliverfalls @allyeilishh @addisonraesbaby @emiliesblohsh @bilsslut @noodleswashere @bilsbabyy @bitchesbrokenpromises @billsdollie

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Grossular garnet specimen from Canada

Photo: Henk Smeets/Tomeik Minerals.

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Dolomitic carbonatite with quartz and REE fluorocarbonate veinlets from Barra de Itapirapuã, Brazil.

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In the last igneous petrology practical class we studied a thin section from this foliated aegerine nepheline syenite.

Igneous petrology field trip to Poços de Caldas, Minas Gerais. In this field trip we studied some alkaline rocks, like eudialyte nepheline syenite, foliated aegirine nepheline syenite, and phonolite. Poços de Caldas hosts an ancient volcanic edifice. I loved these rocks and this city!!

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Carbonatites from Jacupiranga complex, São Paulo, Brasil.

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Brazilian carbonatites in thin section

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The pink mineral is the eudialyte. The first image is eudialyte nepheline syenite and the second one is the foliated aegerine nepheline syenite

Igneous petrology field trip to Poços de Caldas, Minas Gerais. In this field trip we studied some alkaline rocks, like eudialyte nepheline syenite, foliated aegirine nepheline syenite, and phonolite. Poços de Caldas hosts an ancient volcanic edifice. I loved these rocks and this city!!

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Igneous petrology field trip to Poços de Caldas, Minas Gerais. In this field trip we studied some alkaline rocks, like eudialyte nepheline syenite, foliated aegirine nepheline syenite, and phonolite. Poços de Caldas hosts an ancient volcanic edifice. I loved these rocks and this city!!

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Igneous petrology field trip to São Paulo countryside part 2.

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Igneous petrology field trip to São Paulo countryside part 1

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Igneous petrology field trip to São Paulo state coast.

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Everytime I say that I won't take more rocks and everytime I take more rocks

Me @ Me:

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Sheared rocks are underrated! Look at this. The idea that you can find a sense of motion captured this powerfully in something as static as rock! You probably didn't think rock could have Pathos but there it is!