Longest strand is about 20" 

Gold "donut" beads separate barral shaped white beads that have a slightly glossy oat. 

Snow white.

Large Bead closure typical of c1950's

Metal is gilt , I see no damage 

Age unknow but looks mid century modern

Material? Looks like maybe lucite

I am not a jeweler.   I see no hallmarks or repairs. 

This looks like. necklace I had that was from Germany but I don't see a makers mark on this one.