Meaning of processing in relation to crystalline silica substances and related terms (4)

In these regulations —
engineered stone —
(a) means a CSS that —
(i) is an artificial product; and
(ii) is created by combining natural stone materials with other chemical constituents such as water, resins or pigments; and
(iii) becomes hardened; but
(b) does not include the following —
(i) concrete and cement products;
(ii) bricks, pavers and other similar blocks;
(iii) ceramic wall and floor tiles;
(iv) grout, mortar and render;
(v) plasterboard;
(vi) porcelain products;
(vii) sintered stone;
(viii) roof tiles.