August Wilson, in this ninth entry in his 10-play decade-by-decade cycle, once again cultivates a vividly thriving patch of ideas and lively life-forms on stage with Gem of the Ocean. It's 1904, and ancient, august, ornery Ester Tyler (Phylicia Rashad) child of slavery, mother to all, priestess of remembrance opens her ''peaceful house'' to a cross section of black Pittsburgh, as trouble brews at the local mill. In true Wilson fashion, this isn't so much a play as a teeming character terrarium. But Anthony Chisholm's Solly Two Kings, an incorrigibly free-spirited ex-slave, is an especially rich creation, a beanpole Falstaff, only with, y'know, pride and principles.

