Pearl And Bead Jewelry .
Can a "regular" jeweler do this, or is this kind of repair a specialty?
I would think any competent jewelry maker should be able to repair this;
if you have bead stores in your town, you might even think about
inquiring there, to see if someone there could assist you in repairing
it yourself, or find someone to do the job for you.
I remember hearing that pearl necklaces were supposed to be restrung
frequently as the oils and skin crud eroded the string. I don't know
if it applies to other kinds of beads or if care and frequency of wear
affect the time between restringing.
I just know that if I had nice beaded jewelry I wouldn't want to look
like a cliche cartoon where the string breaks and beads fly everywhere.