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The Encylopedia of gems in English is still under construction. Thanks to visit the encyclopedia of gems in French.

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Eudialyte

Eudialyte
  • Etymology : From the Greek "eu"εὑ = well and "dialusis" διαλυτός = dissolution, referring to its high solubility in acids.
  • Discovery: 1819 by Stromeyer.
  • Type localityKanerdluarsuk, Ilimaussaq,Groenland.

 

To learn more about the mineralogy of Eudialyte, see Mindat.org->

Gemological data

  • Chemical formula : Na15Ca6(Fe2+,Mn2+)3Zr3[Si25O73](O,OH,H2O)3(OH,Cl)2
  • Hardness (Mohs) : 5 - 6
  • Density : 2.74 - 3.1
  • Refractive index : nω = 1.606 - 1.610 nε = 1.610 - 1.613
  • Crystal system : Rhomboedric
  • Group : Eudialyte
  • Mineralogical Class : Cyclosilicates

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