#sanidine

[theoldbone]

Hematite, Sanidine, Fosso Ricomero, Italy, Photo by Gianfranco Ciccolini

[fridurwrites]

That Eye Thing

An Archive of Our Own, a project of the Organization for Transformative Works

It's three years to Sanidine's launch day, and Gabbro's been in space long enough for Gossan to have a rare moment of spare time. Naturally, the best use for spare time is to go confess the information Esker gave them to Slate. It's not like their bad luck might intervene in something that simple. Right?

[karoo-o]

Sanidine

[chillchildvibes]

Sanidite and Microline sketches

(Inspired by Merle and Michonne from the walking dead)

[mineralsandsomerocks]

Crowsnest Volcanics w/ Magmatic Melanite (Black Garnet)

Crowsnest Pass, Alberta, Canada 

[oldearthminerals]

Fluorescent Nosean in Sanidine from Eifel Volcanic Fields, Germany. $10 plus shipping. 90 x 64 x 16 mm. 86 grams. . #nosean #sodalite #fluorescentnosean #fluorescentstones #sanidine #fluorescentnosean #mineralspecimens #minerals https://etsy.me/3dqoUme https://www.instagram.com/p/CBvwvETBgx4/?igshid=1rd36jna41mkh

[underthescopemineral]

Allanite-(Ce), Sanidine

CaCeAl2Fe2+(Si2O7)(SiO4)O(OH),   KAlSi3O8

Locality:

Mt Cavalluccio, Campagnano di Roma, Sacrofano Caldera, Rome Province, Latium, Italy

Field of View: 3.1 mm

Beautiful, black allanite-(Ce) crystal, grown in a cavity formed by the interlacing of white, shiny crystals of sanidine. Iridescence is due to a thin layer of opal.

Gianfranco Ciccolini's Photo

Allanite (also called orthite) is a sorosilicate group of minerals within the broader epidote group that contain a significant amount of rare earth elements. The mineral occurs mainly in metamorphosed clay rich sediments and felsic igneous rocks. The International Mineralogical Association lists three minerals in the allanite group, each recognized as a unique mineral: allanite-(Ce), allanite-(La) and allanite-(Y), depending on the dominant rare earth present, cerium, lanthanum or yttrium.

Sanidine is a glassy, high temperature form of potassium feldspar . Sanidine is found most typically in felsic volcanic rocks such as obsidian, rhyolite and trachyte. Due to the high temperature and rapid quenching, sanidine can contain more sodium in its structure than the two polymorphs that equilibrated at lower temperatures.  Colourless, beige and attractive warm-brown stones are faceted.

[ifuckingloveminerals]

Haüyne, Sanidine

In den Dellen quarries, Niedermendig, Mendig, Laach lake volcanic complex, Eifel, Rhineland-Palatinate, Germany