Vote for your favorite mineral in #MinCup26! - Azurite vs. Smithsonite
It's carbonate-vs-carbonate to kick off Mineral Cup 2026 with copper-rich Azurite against zinc-rich Smithsonite.
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Adamsite-(Y) from
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


Locality type:Quarry
Classification
Species:Adamsite-(Y)
Formula:NaY[CO3]2 · 6H2O
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:Rare
Confirmation
Validity:Valid - Type Locality
Associated Minerals Based on Photo Data:
Franconite21
Thomasclarkite-(Y)20
Rhodochrosite16
Microcline16
Aegirine14
Shomiokite-(Y)14
Synchysite-(Ce)7
Calcite6
Quartz5
Albite5
Rhabdophane-(Ce)4
Rémondite-(Ce)3
Genthelvite3
Dawsonite3
Kupletskite2
Niveolanite2
Gaidonnayite2
Lanthanite2
Niobokupletskite2
Astrophyllite Supergroup2
Elpidite1
Catapleiite1
Data
Mineral Data:Click here to view Adamsite-(Y) 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 GalleryView Gallery (57 photos)
Data Identifiers
Mindat Occurrence Record ID:19933
Long-form Identifier:1:3:19933:1
GUID (UUID V4):0
References
 
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