Editing Hammerstone (section)

==== India ====
In the [[Gujarat]] region ([[India]]) there are still artisans who make thick [[chalcedony]] necklace beads by knapping. This activity is concentrated in the city of Cambay (or [[Khambhat]]) and has certain peculiarities; It uses the kickback technique between a pointed metal passive hammer and an active [[water buffalo]] horn hammer. The craftsmen shape the beads, holding them against the metal hammer and hitting them with the horn, causing little pieces to fly off little by little. The result is a very efficient method. Although the technique persists today, it is suspected that it must have appeared in very ancient times, perhaps with the first [[brass]] instruments, in the Chalcolithic.<ref name="Inizan"/>