mineral

Eudialyte

Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2

Hardness: 5-5.5; Color: Magenta-red or burgundy in a black and white matrix; Luster: Vitreous; Crystal Structure: Trigonal; Gravity: 2.7–3.1

Hardness: 5-5
Color: Magenta-red or burgundy in a black and white matrix
Luster: Vitreous

Identified June 23, 2026More mineral →

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Physical properties

Hardness: 5-5.5; Color: Magenta-red or burgundy in a black and white matrix; Luster: Vitreous; Crystal Structure: Trigonal; Gravity: 2.7–3.1

Formation & geological history

Formed in unusual alkaline igneous rocks such as nepheline syenites. Most commonly associated with the Kola Peninsula and Greenland geologic formations.

Uses & applications

Primarily used as a minor ore of zirconium and as a popular collector's gemstone or lapidary material for jewelry like cabochons.

Geological facts

Eudialyte is often called 'Dragon's Blood' in the trade due to its deep red color. It is highly valued for its complex chemical structure containing rare earth elements.

Field identification & locations

Identify by the vibrant magenta-red patches contrasted against black (often aegirine) and grey/white mineral matrices. Found in alkaline massifs.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral