mineral
Eudialyte in Matrix
Na15Ca6(Fe,Mn)3Zr3(Si,Nb)(Si25O73)(O,OH,H2O)3(Cl,OH)2
Hardness: 5-5.5. Color: bright pink to magenta, reddish-brown (iron staining), white/gray matrix. Luster: Vitreous. Crystal structure: Trigonal. Specific gravity: 2.7-3.0.
- Hardness
- 5-5
- Luster
- Vitreous
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Physical properties
Hardness: 5-5.5. Color: bright pink to magenta, reddish-brown (iron staining), white/gray matrix. Luster: Vitreous. Crystal structure: Trigonal. Specific gravity: 2.7-3.0.
Formation & geological history
Primarily forms in alkaline igneous rocks (nepheline syenites) through magmatic crystallization. Often found in pegmatite veins within these massifs. Most specimens are from the Phanerozoic era.
Uses & applications
Used as a gemstone for collectors, often cut into cabochons. Also an ore of zirconium and rare earth elements (REEs) in specific industrial extraction contexts.
Geological facts
Eudialyte is known for its intense magenta-red color. It is mildly radioactive due to the presence of small amounts of thorium or uranium. It was first described in 1819 from specimens found in Greenland.
Field identification & locations
Identify by its distinct raspberry-red or pink color embedded in white or light-gray groundmass. Often associated with aegirine (black needles) and feldspars. Found in Russia (Kola Peninsula), Canada, and Greenland.
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Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
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Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
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Gypsum (variety Selenite or Alabaster)
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Mineral
Nephrite Jade
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Mineral/Rock