Sentence:  Quartz with spangled inclusions is known as <WSD>aventurine</WSD>. The included minerals are scales of shiny mica or hematite. The most familiar <WSD>aventurine</WSD> is of a reddish-yellow color and has a coppery sheen. Only small quantities of <WSD>aventurine</WSD> have been found in the United States. 
Meaning of the word marked with <WSD> tags:  A variety of translucent quartz, spangled throughout with scales of yellow mica.