I have to point out that none of the references are actually beads. They are domes ...Doming is a jewellery metalworking technique where half round shapes are produced in a cube shaped brass former so these decorative shapes although possibly thought of as beads are not... The Ceramic tile pre Islamic Iranian and the weapons and the jewellery all illustrate this technique. Heres a gold addition from Hindu Jewellery making ...

A South India weapon with the raised dot form under the handguard at the throat...

Did some looking, found an example from the 16th century of an Indian dagger with what looks like beading on the inside of a vegetal motif. Might just have been used to give the plants texture...