Fluorite

Unknown Owner

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This extraordinary large cabinet Fluorite specimen is from the less often seen location of Victory mine (Addison shaft) at Cave-in-Rock, Hardin County, Illinois. Addison shaft is to the south of Cave-in-Rock town and adjacent to the north bank of the Ohio River. A bed of superb purple Fluorite crystals is attached to a sandy-coloured matrix of blocky, sandy-limestone. The Fluorite forms intergrown cubic crystals pitted with geometric, hopper-like concave structures and grade from rich blackberry-purple surfaces to pale lemon-tinged interiors. In transmitted light the majority of the crystals are opaque with translucent faces, while towards the edges, semi-transparent crystals display nice colour zoning of blackberry and lemon-tan. The longest cube edges measure to 4.5 cm, although the average prism size is typically 2 to 3 cm on edge. This is an excellent Cave-in-Rock Fluorite of museum quality and size and is accompanied with its own custom-made clear acrylic base, with contour-milled recess, attached support arm and engraved label.