Leucite

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A very LARGE, well-crystallized and complete all-around trapezohedron crystal of leucite pseudomorphing analcime from the TYPE LOCALITY of Monte Somma, Vesuvius, Naples Province, Italy. Very uncommon from this locality. Leucite has the same chemical composition as analcime, except that leucite has no water molecules. 5.2 x 5.0 x 5.0 cm