A nice presentation of lustrous white analcime crystals to 24 mm with black crystals of aegirine from the famous Mont Saint-Hilaire, Canada. The analcime crystals grow one atop another. They are complete, sharp and well crystallized with porcelain faces. Elongated black aegirine blades penetrate in the analcime. For references see the 1990 issue of The Mineralogical Record vol. 21, # 4. In very good condition - some small contacts. On acrylic base.

Splendid!