… of stone or of other mineral substances (including carbon fibres, articles of carbon fibres and articles of peat), not elsewhere specified or included. …
Explanatory notes
… filamentary forms. The products are used, for example, for reinforcement. (3) Articles made of peat (for example, … stone (e.g., lydite, a hard, fine-grained dark stone resistant to acids). (8) Paving blocks and slabs obtained … of fused basalt; these are used, because of their great resistance to wear, as linings for pipes, belt-conveyors, …