Bronze sword with inlaid turquoise on the guard, late Spring and Autumn to Warring States. Also a bit of a decorative pattern to the blade itself, which from what I've understood is achieved by first casting most of it using bronze of one composition, and then casting on bits of bronze with a different composition. The use of that for decorative purposes likely followed from doing it for practical reasons, where a harder alloy was used for the edges and a tougher/cheaper (?) alloy for other bits.
Bronze sword, Warring States period (475-221 BC)