igneous

Eudialyte in Syenite (Dragon Blood Stone)

Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2

Hardness: 5-5.5 (Mohs scale), Color: Pinkish-red to deep magenta set in a black and grey matrix, Luster: Vitreous to pearly, Crystal structure: Trigonal, Cleavage: Poor, Specific gravity: 2.7–3.1

Hardness: 5-5

Identified March 5, 2026More igneous →

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Physical properties

Hardness: 5-5.5 (Mohs scale), Color: Pinkish-red to deep magenta set in a black and grey matrix, Luster: Vitreous to pearly, Crystal structure: Trigonal, Cleavage: Poor, Specific gravity: 2.7–3.1

Formation & geological history

Formed in rare alkaline igneous rocks (nepheline syenites and pegmatites) during late-stage magmatic crystallization. Most notable deposits are from the Kola Peninsula, Russia, and the Ilimaussaq complex, Greenland.

Uses & applications

Primarily used as a lapidary material for carvings, beads, and cabochons. It is highly valued as a minor ore of zirconium and for its rarity among mineral collectors.

Geological facts

Named from the Greek 'eu dialytos' meaning 'well decomposable' because it dissolves easily in acid. It is occasionally referred to as 'Dragon Blood' due to its striking red-on-black color scheme.

Field identification & locations

Identified by its distinctive magenta-red patches within a darker crystalline matrix. It is typically found in alkaline plutonic rocks. Collectors should look for vibrant color saturation and minimal fracturing in carvings.

Other igneous specimens

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Blue Apatite

Fluorapatite (Ca5(PO4)3F)

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Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Igneous

Magnetite

Iron(II,III) oxide (Fe3O4)

mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

mineral

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

mineral

Magnetite

Magnetite (Fe3O4)

mineral