Casiterite or Cassiterite: How To spell?
The word Casiterite is misspelled against Cassiterite, a noun meaning "Native tin dioxide; tin stone; a mineral occurring in tetragonal crystals of reddish brown color, and brilliant adamantine luster; also massive, sometimes in compact forms with concentric fibrous structure resembling wood (wood tin), also in rolled fragments or pebbly (Stream tin). It is the chief source of metallic tin. See Black tin, under Black."
Cassiterite has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings ca & iterite which should not be misspelled with single 'S'
Wrong Spelling:  ca-s-iterite  Correct Spelling:  ca-ss-iterite 
Find more wrongly spelled words of Cassiterite to spell it well.