You could make your own coloured beads from something like Fimo or Sculpey which are modelling clays you bake in the oven to make them hard. That would be easy to do and add a very personal touch.
You can mix the clays to get the colour you want, whether a solid colour or a marbled effect. You can then make the hole through the clay before baking.
There is also a silver clay called Art Clay Silver, that you shape by hand like any modelling clay and then fire with a blowtorch, that makes a pure silver item that can be hallmarked if necessary. It is very easy to use and the finished work looks very professional.
Also some artclay videos on youtube.