11/04/2020
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11/04/2020
Crystal clear: Can you see the inside of a crystal?
11/04/2020
Lapis lazuli: via the Silk Road to Tutankhamun.
01/04/2020
Campi Flegrei volcano: Europe's Yellowstone?
30/03/2020
The colours of time: Villages north of Madrid.
28/03/2020
Valley of the Jerte River: Spanish cherries and the Jurassic Period.
27/03/2020
Diamonds: messengers of deep Earth.
11/11/2019
A pale black dot: Mercury transit.
07/11/2019
Spices and coral reefs: Zanzibar.
07/11/2019
Volcano Series: Stromboli, gentle giant or ... not?
05/11/2019
Toledo: an old capital in a river bend.
03/11/2019
Quijorna, 500 ovens on the Sierra slopes.
02/11/2019
La Pedriza: granite pinnacles above Madrid.
— Featured article: Lapis lazuli: Following the trace of a blue gemstone —
Article by Kathelijne Bonne
From high mountain peaks to the pharaohs.
Read how precious stone lapis lazuli found its way from the world's most ancient mines to Mesopotamia, Egypt, and Greece, and finally to the canvases of the great painters. Find out how lapis lazuli formed in the first place, as it crystallized in seams of precious rocks in the midst of plate tectonic turmoil.