Section 13 ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIAL S; CERAMIC PRODUCTS; GLASS AND GLASSWARE 68 Articles of stone, plaster, cement, asbestos, mica or similar materials 68 06 Slag wool, rock wool and similar mineral wools; exfoliated vermiculite, expanded 68 06 90 Commodity Code Description 68 06 90 00