native_name_lang death_date death_place birth_place image_size nationality field native_name birth_date work_institutions known_for image article_title name alma_mater
bg 31 march 2004 -lrb- aged 90 -rrb- sofia , republic of bulgaria plovdiv , kingdom of bulgaria 200px 20pxbulgarian mineralogy ; geology , x-ray crystallography Иван Костов Николов 24 december 1913 o.s. sofia imperial college , bulgarian academy of sciences , national museum university of natural history -lrb- bulgaria -rrb- `` st. kliment ohridski '' , london kostov 's classification of minerals ivan kostov -lrb- 1913-2004 -rrb- . jpg ivan kostov nikolov
 ivan kostov sofia imperial college university `` st. kliment ohridski '' , london
ivan kostov nikolov

ivan kostov nikolov -lrb- bulgarian : Иван Костов Николов -rrb- -lrb- december 24 , 1913 -lrb- o.s. -rrb- plovdiv , bulgaria -- march 31 , 2004 sofia , bulgaria -rrb- was a bulgarian geologist , mineralogist and crystallographer .
