Definition of "euphotide" []

• A rock occurring in the Alps, consisting of saussurite and smaragdite. (noun)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "A curious geognostic discovery remains to be made in the eastern part of America, that of finding in a primitive soil a rock of euphotide containing the piedra de Macagua."
• "Amazon-stone come from the rocks of euphotide, which form the last member of the series of primitive rocks?"
• "Feldspar with a basis of souda (compact feldspar) forms, with diallage, the euphotide and serpentine; with pyroxene, dolerite and basalt; and with garnet, eclogyte."