Anhydrous normal carbonate, paramorph of alstonite and barytocalcite, forms a series with olekminskite
Specific gravity: 3.6
Hardness: 4 to 4½
Colour: Colourless, white
Solubility: Dissolves with effervescence in dilute hydrochloric acid
Common impurities: Sr
Paralstonite occurs in low-temperature hydrothermal
lead-zinc deposits (Webmin).
At the Kedrovyi alkaline massif, Murunskii Massif, Chara and Tokko Rivers Confluence, Aldan Shield, Russia, paralstonite is associated with olekminskite, calcite, baryte, ankerite, ancylite-(Ce), narsarsukite, sphalerite and galena (HOM).
At the type locality, the Minerva No. 1 Mine, Ozark-Mahoning group, Cave-In-Rock Mining Sub-District, Hardin County, Illinois, USA, paralstonite occurs as coatings on baryte with yellow calcite, grey alstonite, purple fluorite and dark brown sphalerite (AM 64.1332).
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