Chalcedony in a sentence as a noun

Mass production would probably have to be more like finding a method to synthesize artificial minerals similar to nephrite, chalcedony, or carbonado. Perhaps slag wool, basalt fiber wool, ceramic fiber wool, or fiberglass wool, compressed into a felt, then impregnated with a noncrystalline material or polymer?

Chalcedony definitions

noun

a milky or greyish translucent to transparent quartz

See also: calcedony