Explanatory notes
… features cannot, normally be used for jewellery or for goldsmiths’ or silversmiths’ wares. (2) Black diamonds, … plane of the layers), bruted, tumbled or which have only a small number of polished facets (e.g., so-called windows, … natural plane of the layers), bruted or which have only a small number of polished facets (e.g., so-called windows, …