La parure en calla

Callais refers to the green stones from which the remarkable ornaments discovered in several Neolithic sites in Western Europe are made. A term used at the beginning of our era by Pliny the Elder and taken up by the first archaeologists of the early 20th century during the first excavations of the large tumuli of the Carnac region (Morbihan), callais includes several mineral species, especially variscite and turquoise, both hydrated aluminium phosphates with a green to blue colour. Beads an...