Mineral Family: Cyclosilicates

Chemical Composition: Na15Ca6(Fe,Mn)3Zr3SiO(O,OH,H2O)3 (Si3O9)2(Si9O27)2(OH,Cl)2
Cleavage: Perfect
Color: Red, Green, Brown
Crystal System: Triagonal
Form/Habit: Prismatic to uneven
Fracture: Uneven
Gravity: 2.74-3.1
Hardness: 5-6
Luminescence: None
Luster: Vitreous
Streak: White to pale pink
Transparency: Transparent to opaque

Where does Eudialyte come from?

Eudialyte Placeholder

Eudialyte is mainly mined in Canada, Greenland and Russia. Additional deposits are located in Brazil, Guinea, Madagascar, Namibia, Norway, South Africa, Sweden and the United States (Arkansas).

What is Eudialyte?

Eudialyte is a Silicate mineral. Silicate minerals are the largest family of minerals, including more than 25% of all known minerals and 40% of all common minerals. In addition to being a major part of the Earth’s crust, Silicate minerals have also been found on the moon and in meteorites. Silicates are minerals which contain the elements Silicon (a light gray shiny metal) and Oxygen (a colorless gas). Together, these two elements form a tetrahedron – a shape similar to a pyramid – with a Silicon atom in the center and Oxygen atoms at each of the four corners. These tetrahedra connect with other chemical structures, in six different ways, to form various minerals and rocks. There are six main groups of Silicate minerals. Eudialyte belongs to the Cyclosilicate group which includes the Beryls (Aquamarine, Emerald, and Morganite) as well as Iolite, Sugilite and Tourmaline.

How is Eudialyte formed?

Eudialyte is formed in silica-poor but alkaline-rich igneous rocks.

Where is Eudialyte mined?

Eudialyte is mainly mined as a minor ore for Zirconium and rare earth metals. Occasionally gemstone quality crystals are found for jewelers and collectors.

Eudialyte Enhancements

All Eudialyte may be considered fully natural, enhanced only by tumbling, cutting, or polishing.