Definition of calcedony Calcedony

We found 2 definitions of calcedony from 2 different sources.

What does calcedony mean?

Noun
calcedony - a milky or greyish translucent to transparent quartz
		chalcedony
		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
		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 the colorless watery fluid of the blood and lymph that contains no cells, but in which the blood cells (erythrocytes, leukocytes, and thrombocytes) are suspended