The color of your jeans has been around for millennia. Indigo comes from plants, Indigofera tinctoria and others, and the ancient Greeks and Romans used it to dye fabric in much the same way we do ...

Natural blue mineral pigments for use in painting are limited to the semiprecious stone lapis lazuli and azurite. These natural blues are witnessing a re-birth among a small group of contemporary ...

The p-XRF survey found interesting mineral impurities in a common blue pigment made from the copper mineral azurite. The team then selected seven of the most interesting fragments to study, using ...

The XRF examination of the blue pigment (DZ1, DZ4) revealed relatively high content of Cu, suggesting that blue pigment could be azurite. This, however, was not confirmed by the Raman measurement.

The p-XRF survey found interesting mineral impurities in a common blue pigment made from the copper mineral azurite. The team then selected seven of the most interesting fragments to study, using ...

Mineral Monday is a weekly video series exploring the many amazing minerals, fossils, and historic objects on display at the W.M. Keck Earth Science and Mineral Engineering Museum as told by museum ...

Few blue pigments were known to the European medieval painter: lapis lazuli, cobalt smalt, azurite, cuprorivaite, malachite, and vivianite. However, among these, only lapis lazuli and azurite were ...