Misc: What yellow, fossilised resin did the Greeks and Romans use in jewellery?

Questions

Martin Landau, actor (Mission Impossible, Space 1999, Tucker), born.?

Revolution by workers and students in Guatemala.?

Tom Petty, Florida, USA, singer, born.?

South Africa begins trial of Nelson Mandela and 8 others on conspiracy.?

Herbert Hoover 31st president of US, dies in NY at 90.?