May 15, 2025
Indialite, Osumilite, Nickenicher Weinberg, Germany, photo by Volker Betz
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Indialite, Osumilite, Nickenicher Weinberg, Germany, photo by Volker Betz
Indialite, Pseudobrookite
Mg2Al3(AlSi5)O18, Fe3+2TiO5
Locality:
Nickenicher Weinberg (Nickenicher Sattelberg), Nickenich, Andernach, Eifel, Rhineland-Palatinate, Germany
Nice coloured crystals of indialite (~0.5 mm long) with pseudobrookite in a vug of a clay-xenolith.
Volker Betz’s Photo
Indialite - the Mg analogue of ferroindialite. Hexagonal high-temperature dimorph of cordierite (orthorhombic-pseudohexagonal). The mineral has been assigned to the beryl group. Anthropogenic since it was formed as the result of fusion and recrystallization of sedimentary rocks above burning coal seams. It was subsequently found in nature in hornfels and rapidly quenched volcanic rocks.
Natural Wonder of Cherry Blossom Stones
Natural Wonder of Cherry Blossom Stones
An intriguing geological peculiarity has found in the Japanese city of Kameoka, which lies just over the western mountains of Kyoto city. It’s a small sub-hexagonal-shaped stone of very fine-grained muscovite mica hosted on a type of metamorphic rock called “Hornfels”. Interestingly when the cracked was opened, their internal cross-sections appearance just likes tiny golden-pink flowers. They’re…
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