This gemstone collectible game was manufactured in 1974 by Opal Syndicates LTD. in Adelaide South Australia. A mining game that consists of 4 genuine opal counters, playing board with story and glossary, rules for playing the game, 20 opal strike cards, bank notes, 20 machinery tiles, 34 good luck cards, 20 bad luck cards, card and money holder. - BoardGameGeek