chalcedony
noun
a microcrystalline, translucent variety of quartz, often milky or grayish.
chalcedonic
-
a word derived from
chalcedony.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
When examining the agates, the chalcedonic and jaspery rocks, some of the limestones, and even the bright red sandstones, I was forcibly struck with their resemblance to deposits formed in the neighbourhood of volcanic action.
From Geological Observations on South America by Charles Darwin
It contains a very few pebbles of quartz, and occasionally layers of chalcedonic nodules, like those of chert in our Greensand.
From Volcanic Islands by Charles Darwin
Her eyes of emerald, stars in her opal face, chalcedonic, looked inexorable, and her bosom of precious stones heaved not.
From Psyche by Louis Couperus
In sinking wells in this district the chalcedonic strata seem to be the lowest.
From Geological Observations on South America by Charles Darwin
It seems likely, however, that the solution transuded through the walls generally, penetrating the chalcedonic layers, as Heddle maintained, by osmotic action.
From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg
