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from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having sharp, recognisable crystal faces.


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  • Single euhedral zircon crystal with coarse massive zircon crystals: ZrSiO4.


  • Melt inclusions (n = 21) in euhedral quartz phenocrysts from the pumice contain an average of 2.6 wt. % H2O, 3800 ppm Cl, and 1300 to 5200 ppm


  • The cross-cutting nature of the mineralization, the assemblage of sulfide and alteration minerals, and the presence of open spaces with euhedral minerals, all point to an origin at shallow to moderate depths (a few hundred meters below surface) from hydrothermal solutions.

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