Значения термина black chalcedony на английском

One is made of white translucent quartz, and others of dark gray and black chalcedony.

A heaved stone broadsword, a full arm's length of razor-sharp black chalcedony, arced through the air to take the head from young Manadara Sheer.

Numerous specimens of arrow-points, flakes, cores, and rough masses of gray and black chalcedony, obtained partly from the mound, and partly from the soil surrounding it.