Two to go - it's not easy today is it. 41a Variety of orthoclase used by Lalique M?O?S?O?E. Is it moonstone?? 51d another name for catkin A?E?T. NO guesses here
is 17a signs? elements of the western zodiac first described by ptolemy. 31d I had synchronic but if 33a is small stuff that makes it incorrerct - help please