Abstract
I PROPOSE to limit the term “artificial” to such productions as possess the same chemical composition and physical constants as the natural stones, differing from them only in minute details consequent upon their being produced in the laboratory instead of being dug out of the earth, all other makeshifts being properly described as “imitations.”
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References
"Mémoire sur la reproduction artficielle du rubis par fusion", M. A. Verneuil, Annales de Chimie et de Physique, September, 1904.
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The Production and Identification of Artificial Gems . Nature 86, 433–435 (1911). https://doi.org/10.1038/086433b0
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DOI: https://doi.org/10.1038/086433b0