Mineral: Fluorite
Locality: Denton Mine, Rosiclare formation, Goose Creek Mine group, Harris Creek Sub-District, Hardin County, Illinois, USA
Dimensions: 20 x 14 x 8 cm / main crystal: 10.6 cm

Description: Mass: 2688 g MIM number: 1454 Probable year of extraction : 1983 Cluster of large translucent cubes of a pastel blue color, fairly well separated and with matte faces. The main cubes exhibit resumption of growth near the edges, and microcrystals of chalcopyrite stud the interstices. Photographer: AINU / Augustin de Valence; Publications: "American Mineral Treasures", "Mineralogical Record: May-Jun 2008" Ex collection: Ross C. Lillie (USA)

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