Vainstone or Veinstone: How To spell?

The word Vainstone is misspelled against Veinstone, a noun meaning "The nonmetalliferous mineral or rock material which accompanies the ores in a vein, as quartz, calcite, barite, fluor spar, etc.; -- called also veinstuff."

Word contains consecutive vowels 'EI' in between alphabets v & nstone is misspelled as 'AI'
Wrong Spelling:  v-ai-nstone 
Correct Spelling:  v-ei-nstone 
Find more incorrect spellings of Veinstone to spell right way.