Bitumen, Calcite, Fluorite

Locality: Hastie's Quarry, Spar Mountain, Cave-in-Rock Sub-District, Illinois - Kentucky Fluorspar District, Hardin Co., Illinois, USA

Note: The mineral species Bitumen is not listed in our database for this locality. This specimen may be misidentified or the mindat list of minerals at this locality may be incomplete.

Calcite and fluorite pseudomorph after water! This shows an area where various size droplets of water were positioned in the oil between the calcite and fluorite. At some point before or after the oil dried (creating bitumen), the water droplets were replaced by calcite and fluorite (upper right). The specimen broke along the contact where the bitumen separated the calcite and fluorite. The spherical droplets remained leaving mounds in the calcite. The largest droplet at the bottom is cracked and is actually a bubble! Field of view is about 4 mm. Specimen collected in 1983. Alan Goldstein specimen (FL23) and photo.

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Photo added: 15th Jan 2008

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Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: 15th Feb 2012 20:58:12