Good jeweler in San Francisco who can solder a ring?

you might find something in here

San Francisco Jewelry Repair in San Francisco CA
http://www.superpages.com/yellowpages/C-Jewelry+Repair/S-CA/T-San+Francisco/

jewelry repair” in San Francisco, CA
http://www.insiderpages.com/s/CA/SanFrancisco/JewelryRepair

or if you happen to be in the San Francisco area, you are most welcome to visit our store and bring your item(s) for repair/replace/cleaning, and we’ll make it for you, like new.
http://jewelplus.com/repairservices.html

Jewelry Repair
Offering a complete range of jewelry services from sizing rings, soldering chains, retipping settings, polishing and steaming. In most cases services can be done while you wait and watch!
http://www.jewelsmiths.com/

San Francisco, CA Jewelers
http://local.sanfrancisco.com/Jewelers.q.html

Revere Academy of Jewelry Arts – this is an actual SCHOOL they might have advice
http://www.revereacademy.com/

The Gem and Jewelry World’s Foremost Resource on The Internet
http://www.ganoksin.com/site-map.htm