Home > Laskowski Ⅳ – July 13 > MS1878 Epistolite


Epistolite is a hydrous sodium niobium titanium silicate. Bøggild (1901) named the species using the Greek root epsitole for a letter, since the mineral forms white rectangles. Sokolova & Hawthorne (2004) solved the epistolite crystal structure and established its currently accepted chemical formula.

Epistolite here forms a pearly surface, 1.7 × 1.8 cm. The epistolite is curiously foliated (or curved). The matrix is granular white albite with minor dark green aegirine also present. From the collection of E.R. Laskowski (1949-2020), a mining engineer who retired to Tucson, Arizona.

Price: $125

Item code: MS1878

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