Donnayite with Albite, Pyrite

specimen number:
2063218

location:
Poudrette Quarry, Mt. St. Hilaire, Quebec, Canada

description:
A blocky crystal of this rare mineral 0.4 cm in size on a matrix with crystallized albite and pyrite. In good condition. The specimen comes with a previous label from the collection of Ray DeMark.

The Poudrette Quarry is situated within the Cretaceous-aged Mont Saint-Hilaire alkaline intrusive complex in Quebec, Canada, formed by rare magma intrusions that concentrated high levels of incompatible elements. Operating primarily as a commercial stone quarry, it became world-famous among mineralogists and collectors due to its complex pegmatite pockets and xenoliths, which have yielded hundreds of unique and rare mineral species found nowhere else on Earth. Intensive commercial quarrying operations over the decades exposed these rich cavity systems, allowing researchers and hobbyists to salvage an extraordinary diversity of pristine specimens before active extraction wound down.

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