It’s creating—not necessarily selling—that drives the men behind Charles Koll JewellersMalcolm Koll, co-owner of Charles Koll Jewellers in San Diego, never guessed his youngest son, Richard, would join the family business, which was founded in South Africa in 1946. Actually, “he swore up and down he would never do it,” recalls the retailer, who operates the shop with jewelry designer David Armstrong, head of the design workshop for the store’s sizable custom business. But the South African–born retailer, who helped his father, Charles Koll, move the business from Pretoria, South