Felspar.—Pottery, art metal.
Rock Crystal.—Spectacle manufacture, art metal, electrical apparatus, optical instrument.
Agate, Bloodstone, Hæmatite.—As burnishers in many trades.
Diamond Bort.—Diamond cutting, lapidary work, spectacle manufacture, railway carriage.
Diamond.—Jewellery, glaziers’ diamond manufacture.
Amber, Amethyst, Crocidolite, Garnet, Opal Ruby, Sapphire, Carnelian, Topaz, &c.—Cut stones in jewellery, lapidary work, watch and clock manufacture, art metal work, electro-plate, whip, fine wire drawing.
GUMS.
Arabic.—Brass founding, printing and lithography, optical instrument, electro-plate, pen, whip, light metal trades, wholesale boot and shoe.
Benzoin.—Wire mattress, railway carriage.