Nay, the very colour of the stones, and the quantity of what bears every resemblance to vitrification, scattered about, all tend to induce the, belief that the main island owes its formation to the same cause which doubtless produced the smaller one that has now disappeared.
"The Campaigns of the British Army at Washington and New Orleans 1814-1815"
G. R. Gleig
Annotation V. Upon the Knowledge of the differing wayes of making Minerals and Metalls produce their adventitious Colours in Bodies capable of vitrification, depends the pretty Art of making what Chymists by a Barbarous Word are pleas'd to call Amanses, that is counterfeit, or factitious Gemms, as Emeralds, Rubies, Saphires, Topazes, and the like.
"Experiments and Considerations Touching Colours (1664)"
Robert Boyle
"It is not impossible," says Squier, "but, on the contrary, very probable, from a close inspection of the mound pottery, that the ancient people possessed the simple approximation toward the potter's wheel; and the polish which some of the finer vessels possess is due to other causes than vitrification."
"The Antediluvian World"
Ignatius Donnelly