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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
 Description:
_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



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 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.
 Description:
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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:  1425 Time(s)

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Bob Harman




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PostPosted: May 27, 2021 09:01    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Bob Harman wrote:
In 2013, while field collecting at the Indiana rte 56 road cuts in Washington County, a fellow pulled off the road near my collecting. When this happens, I get a little anxious as to what the stranger's motives might be. This fellow though, was a friendly local who was interested in what I was doing and proceeded to tell me that he lived nearby with considerable surrounding land. He had a stream in a ravine and had seen geodes in it and said, if I wanted, I could explore the area. In general going onto private property is not so easy here in the U.S. Midwest, so I thanked him.
The next time I was down there, I made it a point to seek out his ravine with not much real hope as these situations rarely lead to anything substantial. The site was a steep heavily wooded rocky ravine with a sharp bend and a shallow stream coursing through the ravine. The rocky walls of the ravine actually hosted a few large and very large promising geodes so I became rather enthused. The whole site is not very big and over these past 2 years I have found about a dozen very collectible and hi end examples. These 2 pictured are probably the 2 best examples. The very large example has been shown to several dealers at the larger shows and they suggest culling out the area with the calcites to make a specimen rather than a geode, but so far, I have resisted.



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 Mineral: Calcite on Quartz (variety milky)
 Locality:
Washington County, Indiana, USA
 Dimensions: 15 cm x 15 cm
 Description:
Recently curated the "cap"
See the larger portion of this specimen posted on June 11, 2016.
Near the top of page 3 of Indiana minerals
 Viewed:  284 Time(s)

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Bob Harman




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PostPosted: Jun 16, 2021 08:56    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Nice quality or interesting very large Indiana geodes are surprising uncommon, most, for some reason, having a relatively small/dingy central cavity. This example shows a relatively small cavity, but otherwise is quite interesting.

This self-collected example from about 20 years ago is 11" x 9" or about 28 cm x 23 cm and weighs 37 lbs or about 16.8 kg. It was whole when collected, but I left the "cap" for other collectors, as adding nothing to this bigger portion.

Today I can barely lift the specimen, much less carry from where it was found back to my vehicle! This is the one example from my collection that "escaped" my display room as it is used as a conversation piece in our house's family room.



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 Mineral: Quartz with Aragonite, Calcite and Dolomite (variety ferroan dolomite)
 Locality:
Monroe County, Indiana, USA
 Dimensions: 11 cm
 Description:
Druzy quartz, aesthetically iron stained quartz, aragonite , ferroan dolomite and calcite
 Viewed:  95 Time(s)

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fullsizeoutput_39d5.jpeg
 Mineral: Quartz with Aragonite, Calcite and Dolomite (variety ferroan dolomite)
 Locality:
Monroe County, Indiana, USA
 Dimensions: the cavity is 14 cm x 9 cm
 Description:
druzy quartz, aesthetically iron stained quartz, aragonite, ferroan dolomite and calcite
 Viewed:  94 Time(s)

fullsizeoutput_39d5.jpeg


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