Mineralogy - Blog Posts

Hii, how are you? it's been a while. I'm on vacation, but I've been studying for my first internship that starts in two weeks! i've also taken advantage of this free time to draw (i haven't done it in a while 🎨).

Anyway, here are some photos of the minerals i've studied and what i have done this week ✨️

1st pic: Galena

2nd pic: Glaucophane

3rd pic: A vein of Epidote and calcite

4th pic: my drawing

5th pic: my beautiful cat Dante

💖

Cristobalite, Hematite

SiO2, Fe2O3

Locality:

Caspar quarry, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany

An interesting homoepitactic intergrowth from brown and black hematite  

Photo: Michael Förch

Cristobalite is a silica polymorph that is thermodynamically stable only at temperatures above 1470°C, up to the melting point at 1705°C, at atmospheric pressures. It commonly metastably persists or even forms at much lower temperatures in silica-rich volcanic and sedimentary environments. It can form crystals in cavities, probably vapour-deposited, or spherulites in obsidian or other silicic volcanics.

Hematite is rather variable in its appearance - it can be in reddish brown, ocherous masses, dark silvery-grey scaled masses, silvery-grey to black crystals, and dark-grey masses, to name a few. What they all have in common is a rust-red streak.

I just bought my CRYSTAL GRAIL like fashion people have their grails I have a list of crystal grails which are rare and expensive crystals from specific places this is a Smithsonite from the famous Kelly mine I’m so happy that I was able to buy one !! I can’t wait for it to arrive I also bought one t shirt because I’m going to Italy on a 5 day trip soon and I don’t have many clothes