Eudialyte correctly pronounced 'you~die~a~lite' is commonly described as a complicated mineral that dissolves in acid. In some cases it can dissolve completely. Some minerals in this group are believed to have as many as forty six different chemical elements.
There are twenty six confirmed varieties of the mineral eudialyte which is part of the reason it's described as being complicated and difficult to identify. Rubellite which is a variety of tourmaline can look very similar and polished stones are sometimes mistakenly sold as eudialyte.
Although first discovered in Greenland, the vast majority of this rare mineral now comes from the Kola Peninsula in the far north west of Russia. This region lies almost completely within the arctic circle. Eudialyte can also be found on Mount Saint Hilaire in Canada and in a small number of other locations around the world.
With eudialyte being relatively soft these stones have only been lightly tumbled. Although highly polished they're not completely smooth and most have indentations or minor anomalies. The rarity of eudialyte makes finding any material at all relatively difficult particularly tumbled stones.
These eudialyte tumbled stones are classified as grade A material. They're a medium sized stone but due to minor differences in size we've split them into small and medium.