In the Decatur area:
Bazillions of Beads by Shoshanna
620 Medlock Rd
Decatur, GA 30033
This is at the intersection of North Decatur, Scott and Medlock; in the same shopping center as Melton's App & Tap, around the corner in between the Natural Buzz Salon and the Woodshed. Hard to find but worth it.
3172 E Ponce de Leon Ave.
Scottdale, GA 30079
p: (404) 371 8922
I pass this every day on my way to the MARTA station, but have never stopped to look in. Looks like they have classes in jewelry making, woodworking and other things in addition to art & crafts for sale.