07-09. Goethite #1.

Azurite to Goethite. From the clouds in the sky to the ground of the earth – I will explore the geometry of Goethite for week #28 of this tour of Geometry of Nature.

Goethite is a pervasive little mineral found all over the planet and even on Mars. Its crystal is orthorhombic and dipyramidal. Technical manuals describe Goethite as a form of concretions, stalactitic formations, oolites, reniform or botryoidal accumulations – a poetic descriptive that would have amused the writer in Goethe, as the crystal was named after him in the early 1800s.

Like azurite, goethite is also one of the first mineral used as a painting pigment. Traces of it have been found in the prehistoric wall painting of Lascaux. The story goes, it was used in the dyes of King Gordias burial robe because Phrygians though that over time it would start glowing like gold. In Asia, red-orange or reddish brown Goethite pigments, known in Japanese as bengara and ōdo, have also been traditional pigments used in Kofun tomb paintings, early temple paintings and Edo period art production.

The later must have inspired this image!