Other mining and quarrying Standard Industrial Classification (SIC) codes of UK-based importers and exporters 08110 - Quarrying of ornamental and building stone, limestone, gypsum, chalk and slate (613) 08120 - Operation of gravel and sand pits; mining of clays and kaolin (418) 08910 - Mining of chemical and fertilizer minerals (1162) 08920 - Extraction of peat (64) 08930 - Extraction of salt (93) 08990 - Other mining and quarrying n.e.c. (1405)