Usage History of 'calcedony'

The following chart shows how frequently 'calcedony' appeared in printed materials over time. For example, the word 'calcedony' occurred 10 times in books in 1681 and 498 times in 2008. From 1681 to 2008, the word 'calcedony' was used a total of 11,979 times in books scanned by Google. See Reference: Google Ngram project.

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