Scientists recreate the ancient Roman Lycurgus Cup that changes colour
Scientists at the University of Sheffield have recreated ancient Roman dichroic glass similar to the fourth-century Lycurgus Cup held in the British Museum: in direct light it is green, when backlit it is red. The secret lies in nanoparticles of gold and silver, and the accuracy of the colour depended on the item's position in the furnace.
Otabek Yusupov