Eudialyte polished plate 14,3g, Russia

Eudialyte is a very rare exclusive mineral of nepheline syenites and associated pegmatites. Eudialyte is named after the Greek "eu" - well and "dialytos" - soluble, which indicates its easy solubility in acids.
Translucent to translucent red (pyrope-like) to reddish-brown eudialytes can occur either as crystals or in the form of massive grains. But nicely shaped crystals are very rare. The most famous eudyalite sites can be found on the Kola Peninsula in Russia