World production of mica was estimated to have increased by 6% to 375,000 t from 353,000 t in 2017 (tables 1, 11). The quantity of ground mica sold or used by producers decreased by 6% to 65,300 t valued at $22.8 million from 69,700 t valued at $23.4 million in 2017 (tables 1, 2). Essentially all sheet mica used in the United States was imported.Web