EUDIALYTE Eudialyte is a fairly rare mineral.  It has a poor crystal habit, so when crystals are found, they are prized by collectors. However, it is very attractive when polished for use in jewelry.  It has a deep red color in a matrix of black, gray and white. The Kola Peninsula, Russia, is the locality which produces much of the eudialyte seen on the market today.  Eudialyte is a source of zirconium.

Mineral class:  silicates ♦ Variety of: quartz ♦
Chemistry: Na4(Ca,Ce)2(Fe++,Mn,Y)ZrSi8O22(OH,Cl)2 - description:
sodium calcium ceriumiron manganese zirconium silicate hydroxide chloride ♦
Moh's hardness: 5 - 5.5 ♦Transparency: transparent to translucent ♦
Crystal system: trigonal ♦ Luster: vitreous ♦
Color: pinkish red, red, yellow, yellowish brown, violet ♦
Localities: include Quebec; Kola Peninsula, Russia; Greenland, Madagascar, USA