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Variant of chalcedony.
a variant spelling of chalcedony
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|Noun||1.||calcedony - a milky or greyish translucent to transparent quartz|
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
agate - an impure form of quartz consisting of banded chalcedony; used as a gemstone and for making mortars and pestles
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
transparent gem - a gemstone having the property of transmitting light without serious diffusion