Hard Carbonate of Lime (*Calx carbonata dura*) (1802–17) by James Sowerby, from British Mineralogy.

Source: Smithsonian Libraries and Archives / Biodiversity Heritage Library

https://pdimagearchive.org/images/ba1debec-9077-455b-a71c-0750e1d8736e

#minerals #marine #geology #biology #rocks #invertebrates #mineralogy #art #publicdomain

It may be Friday, but it's never too late for #ThinSectionThursday 😁 🤡 Here's a rock (from @geologymull) newly photo'd yesterday: a lovely fresh olivine dolerite from the very-rarely-visited Stac Mhic Mhurchaidh, an uninhabited rock west of Iona. The violet colour of the clinopyroxene crystals "bespeaks titanium" as the early C20th geological survey reports elegantly used to say. 🤓 😊 Field of view about 3.5mm wide. More image info in Alt-txt.

#Geology #Mineralogy #Mull #Igneous #Microscopy

Are you looking for a PhD position in the field of experimental planetary science? Do you have a background in Geochemistry, Mineralogy, Petrology, or Earth and Planetary Sciences in general?

The ERC Starting Grant group ELMO led by Christian Renggli @bsky.app.profile.renggli.bsky.social is looking for a doctoral researcher to join them: https://www.mps.mpg.de/phd/experimental-laboratory-magma-ocean

Application deadline is 1 June 2026.

#PhDPosition #MPSGoettingen #JobAd #Planetology #PlanetaryScience #EarthScience #Geochemistry #Mineralogy #Petrology #MagmaOcean #Planets #RockyPlanets #Space #Astrodon #SolarSystem #Goettingen #Germany