Australian opals, Len Cram, a Journey with colour in four volumes 'A history of Queensland opal 1869 - 1979', 'A history of white Cliffs opal 1889 - 1999', 'A history of South Australian opal 1840 - 2005' & 'A history of Lightning Ridge opal 1873 - 2003', the leather bound limited edition in individual slipcases, uniformly numbered #34 of the limited edition of 100, all signed by the author/publisher and with original Ownership certificates signed by Cram. A superb 'As new' set. (4).