Horned natrolite?

Locality: Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada.

Obviously this natrolite contains some uranyl, which makes it light up green under SW.

The crystals are about 30 mm high.

Source: Fluorescent Minerals Workgroup MKA

Elongated natrolite crystals fluorescing due to uranyl
Nicely terminated natrolite crystas

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