| Locality type: | Quarry |
| Classification |
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| Species: | Gypsum |
| Formula: | CaSO4 · 2H2O |
| Habit: | prismatic, bladed |
| Colour: | colourless, white |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Fluorite | 8 |
| Quartz | 6 |
| - var Smoky Quartz | 6 |
| Siderite | 1 |
| Data |
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| Mineral Data: | Click here to view Gypsum data |
| Locality Data: | Click here to view Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada |
| Photo Gallery | View Gallery (8 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 22124 |
| Long-form Identifier: | 1:3:22124:1 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Gypsum |
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| 14.7km (9.1 miles) | ⓘDulude Quarry (DJL - Carrière Mont-Bruno), Mont Saint Bruno, Saint-Bruno-de-Montarville, Longueuil TE, Montérégie, Québec, Canada |
| 19.5km (12.1 miles) | ⓘDemix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada |
| 36.2km (22.5 miles) | ⓘFrancon quarry, Montréal, Québec, Canada |
| 38.6km (24.0 miles) | ⓘCanadian National Railway tunnel, Mont Royal, Montréal, Québec, Canada |
| 54.7km (34.0 miles) | ⓘSaint-François quarry, Saint-Germain-de-Grantham, Drummond RCM, Centre-du-Québec, Québec, Canada |
| 85.4km (53.1 miles) | ⓘBauval Quarry, Salaberry-De-Valleyfield, Beauharnois-Salaberry RCM, Montérégie, Québec, Canada |
| References |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada