Gabro or Gabbro: How To spell?
The word Gabro is misspelled against Gabbro, a noun meaning "A name originally given by the Italians to a kind of serpentine, later to the rock called euphotide, and now generally used for a coarsely crystalline, igneous rock consisting of lamellar pyroxene (diallage) and labradorite, with sometimes chrysolite (olivine gabbro)."
Gabbro has double "bb" is mispronounced as "b"Remember double 'BB' in between the strings Ga & ro which should not be misspelled with single 'B'
Wrong Spelling:  Ga-b-ro  Correct Spelling:  Ga-bb-ro 
Find more incorrect spellings of Gabbro to spell right way.