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Fluorite on Sphalerite, Cave-in-Rock District, Southern Illinois, Mined c. 1960's-1970's, ex. Sam and Ann Koster Collection, Large Cabinet 8.0 x 8.5 x 13.5 cm, $450. Online Dec. 19


  • $ 45000

A group of large interconnected deep brown lustrous sphalerite topped with attractive purple fluorite.  Note:  The fluorite is preferentially oriented over the sphalerite in classic "snow on the roof" formation.  In excellent condition.  A nice combination specimen of two principal ore minerals.