Hi Dave,
a set of tourmalines (dravite, elbaite, schorl) from the Harvard collection was characterized by Dyar et al. (2001) and Leeman et al. (2001).
It is available for sale from the International Association of Geoanalysts: (
http://iageo.com/microanalytical-reference-materials/) either individually or as a set.
Full references:
References for light elements:
Dyar, M.D., Wiedenbeck, M., Robertson, D., Cross, L.R., Delaney, J.S., Ferguson, K., Francis, C.A., Grew, E.S., Guidotti, C.V., Hervig, R.L., Hughes, J.M., Husler, J., Leeman, W., McGuire, A.V., Rhede, D., Rothe, H., Paul, R.L., Richards, I., Yates, M. (2001) Reference minerals for microanalysis of light elements. Geostandards Newsletter, 25, 441-463.
Leeman, W.P., Tonarini, S. (2001) Boron isotopic analysis of proposed borosilicate mineral reference samples. Geostandards Newsletter, 25, 399-403.