| Library / English Dictionary |
CALCEDONY
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
A milky or greyish translucent to transparent quartz
Synonyms:
calcedony; chalcedony
Classified under:
Hypernyms ("calcedony" is a kind of...):
quartz (a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities)
transparent gem (a gemstone having the property of transmitting light without serious diffusion)
Hyponyms (each of the following is a kind of "calcedony"):
agate (an impure form of quartz consisting of banded chalcedony; used as a gemstone and for making mortars and pestles)
bloodstone; heliotrope (green chalcedony with red spots that resemble blood)
carnelian; cornelian (a translucent red or orange variety of chalcedony)
chrysoprase (a green variety of chalcedony valued as a gemstone)
onyx (a chalcedony with alternating black and white bands; used in making cameos)
plasma (a green slightly translucent variety of chalcedony used as a gemstone)
sard; sardine; sardius (a deep orange-red variety of chalcedony)
