chalcedony造句怎么写

any of various gems (as chrysoberyl or chalcedony) that reflect light when cut in a rounded shape.

Of or relating to a prehistoric human culture widespread throughout north america from about12000to9000b. C. distinguished by sharp fluted projectile points made of chalcedony or obsidian.

a deep orange-red variety of chalcedony.

An apple-green chalcedony used as a gemstone.

a chalcedony with alternating black and white bands; used in making cameos.

A pale to deep red or reddish-brown variety of clear chalcedony, used in jewelry.

A very hard mineral composed of silica, SiO2, found worldwide in many different types of rocks, including sandstone and eties of quartz include agate, chalcedony, chert, flint, opal, and rock crystal.

a green variety of chalcedony valued as a gemstone.

A chalcedony that occurs in bands of different colors and is used as a gemstone, especially in cameos and intaglios.

a green slightly translucent variety of chalcedony used as a gemstone.

a translucent red or orange variety of chalcedony.