Home > Laskowski Ⅱ – June 29 > MS1840 Albite after Marialite found 1977

Albite after Marialite found 1977

Albite and marialite are nominally sodium aluminosilicates. Marialite differs in its essential content of chlorine. Low temperature alteration by water removes the chlorine, preicpitating albite in its wake. This is an interesting example of an alteration pseudomorph, forming by the removal of sodium and aluminum, and possibly addition of silica. Robinson et al. (2019) discuss these pseudomorphs in their excellent book Minerals of the Grenville Province.

This specimen consists of compact pink albite; in places albite has pseudomorphically replaced tetragonal marialite crystals to 2 cm. Minor augite is also present. Strashimirite here forms a loosely packed botryoidal crust of delicate fibers. From the collection of E.R. Laskowski (1949-2020), a mining engineer who retired to Tucson, Arizona. Laskowski self-collected this specimen June 12, 1977.

Price: $75

Item code: MS1840

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