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Astrophyllite, K2NaFe2+7Ti2(Si4O12)2O2(OH)4F

spray of thin light brown crystals.
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
FOV = 2.0 mm

@Micromineral Beautiful astrophyllite specimen! Those radiating bronze blades are classic from Mont Saint-Hilaire - the way they form those star-like sprays is mesmerizing. The alkaline pegmatites there create perfect conditions for these complex titanium silicates. Amazing how something so delicate-looking formed in such an extreme geochemical environment.

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