Specimen #550

Name: Benstonite on Fluorite with Bitumen

Type: Mineral

Locality: Cave-in-Rock District, Hardin County, Illinois, USA

Favorite? N

Fluorescent? N

Size: 7x5x2.5 cm.

Weight: 114

Acquired: 2008-01-22

Source: John Betts

Label: Y

Comment: Rhombohedral white benstonite crystals up to 4 mm on translucent cubic yellow fluorite crystals up to 20 mm across with remnants of black bitumen (natural petroleum) in crevices of the fluorite. No damage. Size of individual crystals: 1-20 mm.

Minerals: Benstonite ((Ba,Sr)6(Ca,Mn)6Mg(CO3)13) Fluorite (CaF2)

There are 5 pictures on file

M00550-01.jpg:

M00550-02.jpg:

M00550-03.jpg:

M00550-04.jpg:

M00550-05.jpg: