The mining and processing of boron minerals and their utilization within value added products are among the national priorities of Turkey. Colemanite, a mineral of boron, is mined, processed and sold in powder form by Eti Mine Works in accordance with relevant quality standards. This project aims to produce a certified reference material to be used in quality control studies of colemanite production and in method development studies for analyses of colemanite and similar boron containing minerals. (in process)