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Mineralpedia Details for Eudialyte

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Eudialyte

Eudialyte

Formula
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Tabular 
Cleavage
Imperfect, None, None 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, yellow, yellowish brown, violet 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Uneven 
Hardness
5-5.5 
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Eudialyte from Norra Kärr, Gränna, Jönköping, Småland, Sweden

Eudialyte
            from Norra Kärr, Gränna, Jönköping, Småland, Sweden

Large massive, but coarse crystalline rock with lage grains of red Eudialyte and dark green amphibole or horneblende amongst other minerals including light brown Rosenbuschite.

Large red crystal grains to 2cm across in a matrix of "torendrikite" or Magnesio-riebeckite as deep green to black prismatic crystals in matrix.

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Eudialyte from Khibiny Massif, Kola Peninsula, Russia

Eudialyte
            from Khibiny Massif, Kola Peninsula, Russia

A 1cm deep red crystalline mass in green Aegerine.

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Eudialyte from Mont Saint-Hilaire, Rouville Co., Quebec, Canada

Eudialyte
            from Mont Saint-Hilaire, Rouville Co., Quebec, Canada

Deep red crystal grains to 6mm in dark green Nepheline.

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Eudialyte from Point of Rocks quarry, Colfax Co., New Mexico, United States

Eudialyte
            from Point of Rocks quarry, Colfax Co., New Mexico, United States

Excellent, sharp, pink and glassy Eudialyte crystals to less than 0.75mm with several other minerals including plates of Polylithionite, black acicular Aegerine, and fibrous brown Lorenzenite.

Also: Very nice, glassy pink, Eudialyte crystals to 1mm with purple crystals of Villiaumite and Lorenzenite.

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Eudialyte from Kipawa alkaline complex, Quebec, Canada

Eudialyte
            from Kipawa alkaline complex, Quebec, Canada

Red Eudialyte as large tabular crystals to 2cm with coarse Magnesio-arfvedsonite & Albite. 

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Eudialyte from Ilimaussaq complex, Narsaq, Kitaa prov., Greenland

Eudialyte
            from Ilimaussaq complex, Narsaq, Kitaa prov., Greenland

A 2.5cm deep red Eudialyte crystal perched nicely on matrix with several smaller. By all accounts it is a good specimen.

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