The purple and pink ones are almost certainly ceramic decals made in Greece. I have some similar to these (and to Stef's) from as early as the late 1970's which I bought in Newcastle in 1978. But similar shaped ceramic beads with different patterns were available through the 1980's/1990's. I bought many kilos of the round variety from a Greek manufacturer, and even sold some of them to Liberty's of London who used them to make fancy bookmarks!