Explanatory notes
… worked, e.g., by cleaving, sawing, bruting, tumbling, faceting, grinding, polishing, drilling, engraving … tumbled or which have only a small number of polished facets (e.g., so-called windows, which are mostly made to … bruted or which have only a small number of polished facets (e.g., so-called windows, which are mostly made to …