I would highly recommend Taboo Studio. It's very very small, but some
great talent is found in there.
They will also be able to tell you about other attractions around SD.
It's way too bad that you missed this HUGE exhibition last year at
the Mingei International Museum, Balboa Park:
It was truly inspirational. You should buy her book, "Arctic
Transformations: The Jewelry Of Denise And Samuel Wallace" which is
equally inspirational, found on Amazon.
A couple places to visit for nature inspiration: La Jolla Shores
(amazing tidepools and cliffs), Balboa Park Downtown San Diego and
Along the street where the Museum of Contemporary Art San Diego is
(www.mcasd.org/home.asp), there are a lot of art galleries and I'm
pretty sure a couple jewelry galleries, and some great restaurants.
Another must see, if you're in the area, is the Gaslamp Quarter
There's just so much, as far as narrowing it down to only jewelry and
metalsmithing, I can't really help ya there... but maybe this list
--Jim Sprague Jr.---