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Weloganite with Dresserite - Francon quarry, Montréal, Québec, Canada (TYPE LOCALITY)
(#:MINS8969)
Sharp, bright yellow Weloganite xl up to 9 mm set nicely on matrix with the typical layered prismatic shape with rare white Dresserite crystals in balls up to 3 mm in association set on matrix from the type locality.
Formula :
Na
2
(Sr,Ca)
2
Zr[CO
3
]
6
* 3 H
2
O
System:
triclinic
Hardness:
3½
Rarity:
rare
Strunz id:V/D.4-30 - NITRATES, CARBONATES and BORATES
Name origin:
Named after Sir William Edmond Logan (1798-1875), first director of the Geological Survey of Canada (1842-1870).
Specimen weight:50 gr.
Crystal size:9 mm
Overall size: 50mm x 47 mm x 32 mm
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