Deep blue Vizhnevite from Vishnevogorsk, the type locality.

Blue Vishnevite in white Cancrinite from Karavan, a sub-locality of Vishnevogorsk.

Vizhnevite from the 115 mine in the Ilmeny Gory

Microscopic grains of Vishnevite from Maly Murun. In this sample it is clearly an alternation product of Nepheline.
The blue grains lay in a perfect hexagonal white crystal, which was once a nepheline crystal.
[all photo/collection: Maurice de Graaf]