chalcedony

/kal-sed-n-ee, kal-suh-doh-nee/US // kælˈsɛd n i, ˈkæl səˌdoʊ ni //UK // (kælˈsɛdənɪ) //

玉髓

Definitions

n.名词 noun

1
plural chal·ced·o·nies.
- : a microcrystalline, translucent variety of quartz, often milky or grayish.

Chalcedony, apparently from amygdaloid of the trap formation, was also found at Port Warrender.
Quartz crystals, with chalcedony, from nodules in amygdaloid.
Red, somewhat slaty jasper, mixed with quartz and chalcedony, and containing specular iron ore.
Hard sandstone, trap or graacke, jasper and chalcedony, appear occasionally; some almost transparent.
A chalcedony made the wearer lucky at law, increased the vigour of one's body, and prevented illusions of the devil.