unidentified micaceous mineral and dark prisms

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Locality: Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada

This is part of the vugs found in the tan colored rock (hornfels?) Field of View id 4mm x3mm. Notice the micaceous mineral formed around dark prismatic needles. These are not yet identified.

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