igneous
Eudialyte with Syenite
Eudialyte: Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Hardness: 5-5.5; Color: Magenta-pink to reddish-brown in a mottled gray/white/black matrix; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: Poor/indistinct.
- Hardness
- 5-5
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 5-5.5; Color: Magenta-pink to reddish-brown in a mottled gray/white/black matrix; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: Poor/indistinct.
Formation & geological history
Formed in alkaline igneous rocks like nepheline syenites and pegmatites through late-stage magmatic crystallization. Commonly associated with the Kola Peninsula and Greenland.
Uses & applications
Primarily used as a collector gemstone for jewelry (cabochons) and as a minor ore of zirconium and rare earth elements.
Geological facts
Eudialyte is often referred to as 'Dragon's Blood' in certain regions because of its deep red color, particularly the specimens found in the Khibiny Massif of Russia.
Field identification & locations
Identify by its distinctive cherry-red to violet-pink patches within a coarse-grained granular matrix. Commonly found in Russia, Greenland, Canada, and Norway.
