Although a considerable amount of work has been published On the occurrence and crystallography of fluorite, comparatively little has been done on the variations in habit of the crystal s. V. Goldschmidt's 'Atlas der Krystallformen' (vol. 4, 1913) gives 160 drawings with references for different forms and combinations of fluorite, but very few attempts have been made to explain the different habits observed. Experiments on the artificial growth of crystals by different methods; under varying conditions of temperature and pressure, and in the presence of foreign substances in the solution do not appear to have been made.