The members of Sodalite group are rare minerals, extemely rare as gem quality faceted specimens.
Tugtupite is a rare mineral from Groenland, Tasseq Slope, Kitaa province. Gem specimens are extremely rare and usually very small and very included. Tugtupit also present a very interesting tenebrescence (color intensity change wit light exposure) and a very strong uv reaction.
Rough: © mineralienatlas.de
Hayüne is a very rare member of the sodalite groupe and this specimen comes from the most famous source, the Eiffel mountains in Germany. It has a very good color and very good clarity for the specie. Hauyne is present in Lapis and gives it’s intense blue.
This Hackmanite from Pakistan is even more interesting because of it’s defaults. Normally Hackmanite present a tenebrescence effect as does the Tügtupite. Not that one, which is in fact a mix of Hacmanite and sodalite. The beautiful iridescent effect indicates that the stone was « glass filled », a treatment to reduce the inclusions.