Manufacture of worked precious stones (precious or fine), except diamants
Engraving of objects in precious metals
Manufacture of costume jewellery and similar items, nor plated, nor covered with precious metals, jewellery items containing artificial stones: artificial precious stones, synthetic diamants, etc.
Retail trade of watches and other articles of watchmaking
Retail trade of articles of jewellery and gold plate
Processing of jewels (with the exception of diamonds) and of semi-precious stones
Production of imitation jewellery and similar products
Repair of other types of instruments
Retail trade in clocks and gems in specialised shops