RT Journal Article SR Electronic T1 The chemical composition of iolite JF American Journal of Science JO Am J Sci FD American Journal of Science SP 13 OP 16 DO 10.2475/ajs.s3-43.253.13 VO s3-43 IS 253 A1 Oliver Cummings Farrington YR 1892 UL http://www.ajsonline.org/content/s3-43/253/13.abstract AB