Facts:   - years active: 1967 -- 1971    - past members: bernie benson -lrb- guitar -rrb- oak o'connor -lrb- drums -rrb- geoffrey `` morris -lrb- guitar -rrb- tom mulcahy -lrb- guitar -rrb- jerry b.b causi -lrb- bass -rrb- '' fieldings -lrb- vocals -rrb- bruce    - origin: usa san francisco , california , united states      - name: black pearl    - background: group_or_band   Based on these bullet points, write a short biography describing the life of black pearl -lrb- band -rrb- .
A:
black pearl was a san-francisco-based band that existed from the late 1960s to the early 1970s .they released two albums , `` black pearl '' -lrb- 1969 -rrb- and `` black pearl - live ! ''-lrb- 1970 -rrb- .