Journal Royal Society of MS. F., Vol. XLL, 1007. Plate X. 



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BLATE X 



FIG.1 



Nugget from Rockhampton, enclosing quartz crystals. See arrows. 

 Magnified 2 diameters. 



1 



FIG. Z. 



Casts of the cavities left after removing the quartz crystals. 

 Enlarged 4 diameters. 



