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A mineralogical trip through the states of USA - Indiana
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Bob Harman




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PostPosted: Mar 17, 2020 06:48    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

For the past several years, over these 6 pages of this mineral trip thru Indiana thread, I have posted some of my self-collected finds near to where I live. Many of the finds have been geodes containing rather common minerals.
Two of the previous photo examples of quartz, var chalcedony, were part of my Indiana quartz display case at the 2017 Cincinnati Ohio show. This case (also previously pictured) is again pictured below with some comments.

While "only geodes", as can be seen, most of my self-collected finds are cabinet size to very large cabinet size and are of my higher end finds.
Individually, ordinary geodes are, well......just ordinary....., but being large, colorful, photogenic, high end, and self-collected (!) these make for very nice display cases at the shows.

The Cincinnati Ohio show, a large regional show (known for its many display cases), like other local and regional shows, are attended largely by folks interested in seeing displays that they can connect with.
My display cases of local self-collected examples of large colorful Midwest geodes have always been positively commented on as being relevant to the viewers, many of whom are parents with youngsters.

Geode hunting in the US Midwest has always been a popular family pastime. Actually seeing display cases of locally found high end self-collected examples is a treat for many of the show goers.
They have routinely let me know of their approval.

The real importance of geodes is that, for many youngsters here in the US Midwest, collecting and seeing displays of them is an entrance into serious mineral collecting or careers in the geological sciences. Bob



fullsizeoutput_3009.jpeg
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_Indiana geodes
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R Saunders




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PostPosted: Mar 17, 2020 09:19    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Very nice and I always encourage our junior members. I found this one in the stream by Bloomington, Ind. Looks like a 2 1/2 in. cream pie.


20181001_081529.jpg
 Mineral: Geode
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Bob Harman




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PostPosted: Apr 08, 2020 09:24    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

For those collectors that find more traditional mineral specimens more appealing than geodes, I might remind them that the Elk Creek South Dakota barytes on calcite and the blue celestine examples from Madagascar have been culled from concretions and geodes.

So it is with this large cabinet size segment culled from a very large Indiana geode found some years ago at the Harrodsburg road cuts locality in Monroe County. Bob



fullsizeoutput_3203.jpeg
 Mineral: Baryte and Calcite and Dolomite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: Example is 22 cm. The baryte is 3.8 cm. The surrounding calcites are over 5 cm.
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Bob Harman




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PostPosted: May 10, 2020 17:46    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Strontianite (SrCO3) is only found sparingly in Indiana.

In Monroe County, it occurs in geodes at the Harrodsburg road cuts. In Harrison County it occurs in vugs at the Corydon Crushed Stone Quarry.

It always occurs as small, 3mm - 7mm white feathery hemispherical masses associated with larger, more collectible calcites, barytes and dolomite; thus it is often overlooked.
Strontianite has to be differentiated from similar appearing hemispherical calcites and aragonite. The strontianite is more "feathery" in appearance.

To my knowledge there is no really display quality Indiana examples of this mineral, the examples that I have are in my Indiana reference collection.



fullsizeoutput_3252.jpeg
 Mineral: Strontianite, Baryte, and Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: The specimen is 13 cm. The strontianite hemispheres are 3 mm - 7 mm
 Description:
Self-collected about 2000
 Viewed:  251 Time(s)

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