Gratonite

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A superb and rich example of this extremely rare mineral from finds of the early 1900s. Illustrated: The Mineralogical Record, Arizona Mineral Collections, 2020; 51(1): 152. Ex. Richard Kosnar; Ex. R.J. Noble Collection. NO LABELS THOUGH. Recently featured in the book, Refined Elegance (Mineralogical Record, Nov. 2022) on page 115. Laszlo Kupi photo.