Peninsula
DaVinci Marble, San Carlos, www.davincimarble.com
Integrated Resources Group, Brisbane, www.marblecompany.com (One of the largest warehouses)
South Bay
Intertile, Milpitas, www.intertile.com (Also has good selection of natural stone tiles)
East Bay
Jerong Marble, Haward, www.jerongmarble.com (Also has prefabricated stone countertops, and stone fireplace mantels)
Pietra Fina, Haward, www.pietrafina.com
San Francisco
Fox Marble, www.fox-marble.com (Beautiful slabs, and also does spectacular fabrication)