Excellent specimen of this rare potassium and zirconium silicate. It shows rich aggregates of hexagonal crystals, transparent to translucent, with an excellent brilliance. Colourless to slightly violet.They are disposed on a matrix of acicular aegirine crystals with a very dark green color, almost black. The Kukisvumchorr Mountains are in the central part of the Khibiny Massif. The area has a very interesting mineralogy, notable for its nepheline syenites.

Delhayelite is a rare phyllosilicate from the Khibiny massif, in the heart of the Kola peninsula. This area is well known for the large number of alkaline pegmatites that have contributed to the mineralogy a large number of new species. This specimen shows the classical form of the fibrous to laminar shape, with brilliance and a very intense orange fluorescence under the long-wave UV light, characteristic of the specimens of Khibiny. A mineral rarity.

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