Sentence:  During this period of two centuries little colour was employed in the lacquer-work, but much gold was used; and those particular kinds of work in which "clouded" gold effects, <WSD>avanturines</WSD>, and tesselated gold are introduced, as well as low-relief modelling of a most perfect kind, were invented and brought to a high state of perfection. 
Meaning of the word marked with <WSD> tags:  A variety of translucent quartz, spangled throughout with scales of yellow mica.