Crystalomancy or Crystallomancy: How To spell?
The word Crystalomancy is misspelled against Crystallomancy, a noun meaning "Divination by means of a crystal or other transparent body, especially a beryl."
Crystallomancy has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings crysta & omancy which should not be misspelled with single 'L'
Wrong Spelling:  crysta-l-omancy  Correct Spelling:  crysta-ll-omancy 
Find more incorrect spellings of Crystallomancy to spell right way.