Hydrated carbonate containing hydroxyl, dresserite group
Specific gravity: 2.96
Hardness: 2½ to 3
Solubility: Readily soluble with effervescence in dilute hydrochloric acid
Dresserite is a rare mineral that to date (November 2021) has been found only at the type locality.
At the type locality, the Francon quarry, Montréal, Quebec, Canada, dresserite occurs in cavities in an alkalic sill intruding limestone. Associated minerals include weloganite, plagioclase, quartz, dawsonite and a powdery hydrous aluminum oxide which gives an x-ray diffraction pattern similar to that of gibbsite (CM 10.84-89).
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