#pegmatites

[kelseyjosundauthor]

Tonight at the bar we

- went in depth about the mineral history of the tabletop marble

- learned the full history of the search for the northwest passage

- spent a good hour discussing fanfiction

- convinced the entire table that Taylor swift is gay

- read all about a 19th century book about fish

- compared the eastern and western Roman Empire in immense detail

- which led to a discourse on Vikings

- went through a play by play of the Seattle Art Show

- and then came back to crystallography again

ADHD is a hell of a drug

[geologyin-blog]

Paprok Tourmaline specimen recently featured on the cover of the Mineralogical Record Magazine special issue of pegmatites of Afghanistan. Photo: Collector's Edge Minerals

[theoldbone]

Indicolite, Quartz, Parun Pegmatite Field, Afghanistan, photo by Kazuto Kadema

[bakurapika]

This one goes out to Peter Sqloint

[jjunebunny]

Omg jrwi apotheosis reference in my science class???

[candy-fae]

Gemsona update!! I’m a Pegmatite! Also called unicorn stone! If you Submit ur Gems, I’ll fuse with them!

[chaoticallycam]

more art of Beryl and one of his cats, Maxixe

[melusina]

“watermelon” tourmaline in a pegmatite

[mineralsrocksandfossiltalks]

Monday's Mineral: Igneous Quartz

Quartz is an interesting mineral that forms both in igneous and sedimentary settings. Today, we will look into the igneous side of things in a bit more detail.

Quartz is a major component of silica-rich igneous rocks also known as felsic rocks. In granite, quartz can make up to 25% of the composition (feldspar makes up the majority).

Quartz is a large component of pegmatites as well. Pegmatites are a type of intrusive igneous rock with a similar composition to granite but on a smaller scale and far less homogenous. Pegmatites are the last part of a magma body to crystallize. This final fluid fraction is high in volatile and trace elements.

Quartz can also form in hydrothermal veins. Hydrothermal veins are a combination of two ways minerals form: heat and precipitation from water. Magma is not just molten rock. It also contains water and because it is underground and under a ton of pressure, that water stays a liquid. At the temperatures that hydrothermal water reaches, it can dissolve a lot of minerals, including silicon dioxide (chemical formula for quartz). As the magma cools, the last part that is still water contains quartz and it can seep into cracks in rocks where it eventually precipitates out.

[adventurealldays]

[geologyin-blog]

Absolutely Gorgeous Kunzite From Dara-i-Pech Pegmatites, Chapa Dara District, Kunar Province, Afghanistan.

Photo: 📷 Fine Art Minerals

[detournementsmineurs]

Plaque sciée d'une "Cristal de Quartz Géant" provenant d'une "Pegmatite" du Brésil au Musée de Minéralogie Mines ParisTech, décembre 2024.

[theoldbone]

Epididymite, celadonite, Vezna I Pegmatite, Czech Republic, photo by Martin Slama

[pulchrasilva]

"I want to inspect his body. How do I turn you on" rumi????

[gabrielnewman]

CLEAVELANDITUL DIN ROMÂNIA - Maestrul nevăzut din spatele Trezirii Celorlalți (NaAlSi₃O₈)

[chaoticallycam]

another silly guy. Really love how this one turned out in particular

this man owns seven cats