Azurite, a naturally occurring copper carbonate mineral, has been a blue pigment for thousands of years, particularly in medieval Europe, where it was a more affordable alternative to ultramarine made from lapis lazuli.
Related Posts
Higgs boson: ten years after its discovery, why this particle could unlock new physics beyond the standard model
Press conference for the announcement of the Higgs boson discovery. Cern Martin Bauer, Durham University and Stephen Jones,…
What’s the shape of the universe? Mathematicians use topology to study the shape of the world and everything in it
You can describe the shape you live on in multiple dimensions. vkulieva/iStock via Getty Images Plus John Etnyre,…
How the age of mammals could end
When Pangea Ultima forms, conditions on Earth will be too inhospitable for most mammals to survive. Maurus Spescha/Shutterstock…
Rising sea levels may threaten 70% of Africa’s heritage sites by 2050
Among the most exposed cultural sites are the iconic ruins of Tipasa in Algeria. Shutterstock Joanne Clarke, University…