| Locality type: | Quarry |
| Classification |
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| Species: | Dawsonite |
| Formula: | NaAlCO3(OH)2 |
| Habit: | striated prisms, bladed cleavages |
| Colour: | white to colourless |
| Quality for species: | Excellent - world class for species or very significant. (!!) |
| Significance: | Unusual or interesting association, relationships with other species, pseudomorphism etc. - see notes. |
| Abundance at site: | Common |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Gmelinite-Na | 11 |
| Aegirine | 11 |
| Sodalite | 10 |
| Catapleiite | 9 |
| Analcime | 6 |
| Siderite | 5 |
| Microcline | 5 |
| Polylithionite | 3 |
| Genthelvite | 3 |
| Natrolite | 3 |
| Adamsite-(Y) | 3 |
| Pyrite | 2 |
| Dolomite | 2 |
| Horváthite-(Y) | 1 |
| Rutile | 1 |
| Mckelveyite Group | 1 |
| Calcite | 1 |
| Sabinaite | 1 |
| Data |
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| Mineral Data: | Click here to view Dawsonite 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 (28 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 4384 |
| Long-form Identifier: | 1:3:4384:7 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Dawsonite |
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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 |
| 31.3km (19.4 miles) | ⓘLafarge Montreal East quarry (Carrière Lafarge Montréal-Est; Francon Montréal-Est quarry; Canada Cement quarry), Montréal-Est, Montréal, Québec, Canada |
| 33.5km (20.8 miles) | ⓘRosemont quarry, Montréal, Québec, Canada |
| 33.6km (20.9 miles) | ⓘVille Marie Expressway (Autoroute 720), Montréal, Québec, Canada |
| 34.5km (21.5 miles) | ⓘMcGill University campus, Mont Royal, Montréal, Québec, Canada |
| 34.7km (21.6 miles) | ⓘMcTavish Reservoir (Rutherford Park; Lower Reservoir; Montreal Reservoir), Mont Royal, Montréal, Québec, Canada |
| 36.2km (22.5 miles) | ⓘFrancon quarry, Montréal, Québec, Canada |
| 37.1km (23.0 miles) | ⓘCorporation (Forsyth's) quarry, Mont Royal, Montréal, Québec, Canada |
| 37.9km (23.5 miles) | ⓘMiron Quarry, Montréal, Québec, Canada |
| References |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada