This class includes:
- manufacture of flat glass including wired, coloured or tinted flat glass

This class includes:
- manufacture of toughened or laminated flat glass
- manufacture of glass mirrors
- manufacture of multiple-walled insulating units of glass

This class includes:
- manufacture of bottles and other containers of glass or crystal
- manufacture of drinking glasses and other domestic glass or crystal articles
- manufacture of glass inners for vacuum flasks and other vacuum vessels

This class excludes:
- manufacture of glass toys cf. 36.50/9
- manufacture of vacuum flasks and other vacuum vessels cf. 36.63/9

This class includes:
- manufacture of glass fibres including glass wool and nonwoven products thereof

This class excludes:
- manufacture of woven fabric of glass yarn cf. 17.25
- manufacture of optical fibre cables for coded data transmission cf. 31.30
- manufacture of optical fibres and optical fibre cables for live transmission of images cf. 33.40/1

This class includes:
- manufacture of laboratory, hygienic or pharmaceutical glassware
- manufacture of glass envelopes
- manufacture of clock or watch glasses, optical glass and optical elements not optically worked
- manufacture of glassware used in imitation jewellery
- manufacture of glass insulators and glass insulating fittings
- manufacture of glass paving blocks
- manufacture of glass in rods or tubes

This class excludes:
- manufacture of syringes cf. 33.10
- manufacture of optical elements optically worked cf. 33.40/1

This class includes:
- manufacture of ceramic tableware and other domestic or toilet articles
- manufacture of statuettes and other ornamental ceramic articles

This class excludes:
- manufacture of ceramic toys cf. 36.50/9
- manufacture of imitation jewellery cf. 36.61

This class excludes:
- manufacture of refractory ceramic goods cf. 26.26
- manufacture of ceramic building materials cf. 26.30, 26.40

This class includes:
- manufacture of electrical insulators and insulating fittings of ceramics

This class excludes:
- manufacture of refractory ceramic goods cf. 26.26

This class includes:
- manufacture of ceramic laboratory, chemical and industrial products

This class includes:
- manufacture of ceramic pots, jars and similar containers of a kind used for the conveyance or packing of goods
- manufacture of ceramic products not elsewhere classified

This class excludes:
- manufacture of refractory ceramic goods cf. 26.26
- manufacture of ceramic building materials cf. 26.30, 26.40

This class includes:
- manufacture of refractory mortars, concretes, etc.
- manufacture of refractory ceramic goods:
. manufacture of heat-insulating ceramic goods of siliceous fossil meals
. manufacture of refractory bricks and blocks
. manufacture of refractory ceramic retorts, crucibles, muffles, nozzles, tubes, pipes, etc.

This class also includes:
- manufacture of articles containing magnesite, dolomite or cromite

This class includes:
- manufacture of non-refractory ceramic hearth or wall tiles, mosaic cubes, etc.
- manufacture of non-refractory ceramic flags and paving

This class excludes:
- manufacture of refractory ceramic products cf. 26.26

This class also includes:
- manufacture of flooring blocks in baked clay

This class excludes:
- manufacture of structural refractory ceramic products cf. 26.26
- manufacture of ceramic flags and paving cf. 26.30

This class includes:
- manufacture of clinkers and hydraulic cements including Portland, aluminous cement, slag cement and superphosphate cements

This class excludes:
- manufacture of cements used in dentistry cf. 24.42/2
- manufacture of refractory mortars, concrete, etc. cf. 26.26
- manufacture of articles of cement cf. 26.6
- manufacture of ready-mixed concrete and mortars cf. 26.63, 26.64

This class includes:
- manufacture of lime:
. manufacture of quicklime, slaked lime and hydraulic lime

This class excludes:
- manufacture of articles of plaster cf. 26.6

This class includes:
- manufacture of precast concrete, cement or artificial stone articles for use in construction:
. manufacture of tiles, flagstones, bricks, boards, sheets, panels, pipes, posts, etc.
- manufacture of prefabricated structural components for building or civil engineering of cement, concrete or artificial stone

This class includes:
- manufacture of plaster articles for use in construction:
. manufacture of boards, sheets, panels, etc.

This class excludes:
- manufacture of refractory cements cf. 26.26

This class includes:
- manufacture of powdered mortars

This class excludes:
- manufacture of refractory mortars cf. 26.26

This class includes:
- manufacture of building materials of vegetable substances (wood wool, straw, reeds, rushes) agglomerated with cement, plaster or other mineral binder
- manufacture of articles of cellulose fibre-cement or the like:
. corrugated sheets, other sheets, panels, tiles, tubes, pipes, reservoirs, troughs, basins, sinks, jars, furniture, window frames, etc.

This class includes:
- manufacture of other articles of concrete, plaster, cement or artificial stone:
. manufacture of statuary, furniture, bas- and haut-reliefs, vases, flowerpots, etc.

This class includes:
- cutting, shaping and finishing stone for use in construction, in cemeteries, etc.
- operations carried out on rough stone delivered by quarries

This class excludes:
- activities carried out by operators of quarries, e.g., production of rough cut stone cf. 14.11
- production of millstones, abrasive stones and similar products cf. 26.81

This class includes:
- manufacture of millstones, sharpening or polishing stones and natural or artificial abrasive products including abrasive products on a soft base

This subclass includes:
- manufacture of asbestos yarn and fabric, clothing, headgear, footwear, cord, string, paper, felt, etc.

This subclass excludes:
- articles of asbestos cement cf. 26.65

This subclass includes:
- manufacture of friction material and unmounted articles thereof with a basis of mineral substances (other than asbestos) or of cellulose
- manufacture of mineral insulating materials, other than of asbestos: manufacture of slag wool, rockwool and similar mineral wools; exfoliated vermiculite, expanded clays and similar heat-insulating, sound-insulating or sound absorbing materials
- manufacture of articles of diverse mineral substances:
. manufacture of worked mica and articles of mica, of peat, of graphite (other than electrical articles), etc.

This subclass excludes:
- manufacture of glass wool and glass wool products cf. 26.14