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




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PostPosted: Jan 24, 2017 20:09    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Another large well displayed Indiana example that some dealers wish to have the area of calcite and barite crystals culled from the remainder of the geode and offered as a non-geode specimen.


fullsizeoutput_2498.jpeg
 Mineral: Calcite, Baryte and Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: Geode is 23 cm. The larger calcite is 7.5 cm; the smaller one is about 6.0 cm. the barite cluster is 3.7 cm
 Description:
Calcites and a Barite cluster on Quartz
Found about 20 years ago and acquired by me about 15 years ago.
 Viewed:  2806 Time(s)

fullsizeoutput_2498.jpeg


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Bob Harman




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PostPosted: Jan 28, 2017 14:05    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Another nice example of a well displayed large Indiana geode with a dominant calcite aesthetically surrounded by several groups of dolomite, all on quartz. The quartz crystals in this example form nice free form growths.


fullsizeoutput_1e6e.jpeg
 Mineral: Calcite and Dolomite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: geode is 13 cm, the calcite is 4.2 cm and the dolomite groups are up to 2.6 cm
 Description:
Self collected early 2016
 Viewed:  2724 Time(s)

fullsizeoutput_1e6e.jpeg


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Bob Harman




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PostPosted: Jan 29, 2017 18:24    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

A recently collected large and well displayed example with calcites on quartz. From my private lands site in Washington County.


fullsizeoutput_24a3.jpeg
 Mineral: Calcites on Quartz
 Locality:
State Route 56 road cut, Canton, Washington County, Indiana, USA
 Dimensions: geode is 14 cm x 12 cm. Calcites are up to 2.2 cm
 Description:
Self collected from private land in 2015

In general my larger well displayed examples are much appreciated in my display cases at the regional shows.
 Viewed:  2678 Time(s)

fullsizeoutput_24a3.jpeg



fullsizeoutput_24a2.jpeg
 Mineral: Calcite on Quartz
 Locality:
State Route 56 road cut, Canton, Washington County, Indiana, USA
 Dimensions: geode is 14 cm x 12 cm. Calcites are up to 2.2 cm
 Description:
self collected on private land in Washington County
 Viewed:  2669 Time(s)

fullsizeoutput_24a2.jpeg


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Bob Harman




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PostPosted: Jan 31, 2017 15:42    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

When I go field collecting at this time of the year, I expect to see freshly exposed examples associated with rock falls resulting from the recent freeze/thaw episodes. So it has been for years.
These examples, from the Indiana route 56 road cuts in Washington County, were high up on the rock wall and, unfortunately, unable to be retrieved intact. The several pix of the larger example show a large 18+ cm specimen with large calcites upon bright red dolomite. If it had been collected intact and cleaned up well, it would have been a show stopper in a display case, but over several years, it fragmented and finally fell in multiple small fragments.

You can see the very porous dolostone matrix fragmenting with slices falling off the wall. If you are unlucky, one of the larger pieces might fall like a guillotine cutting or slicing off your wrist. Since these pictures were taken, both high quality examples became history; unfortunately, not all high quality examples can be successfully collected.



fullsizeoutput_24ab.jpeg
 Mineral: Calcite on Dolomite
 Locality:
State Route 56 road cut, Canton, Washington County, Indiana, USA
 Dimensions: oval geode about 17cm x 11cm
 Description:
calcites on dolomite
This example was about 3.5 meters up on the high wall. It was never collected and finally fell as small fragments.
 Viewed:  2636 Time(s)

fullsizeoutput_24ab.jpeg



fullsizeoutput_24aa.jpeg
 Mineral: Calcite on Dolomite
 Locality:
State Route 56 road cut, Canton, Washington County, Indiana, USA
 Dimensions: geode is 18+ cm, the largest calcites might be 6 - 7 cm
 Description:
First or second year of exposure.

This example was about 4.5 meters up in the high wall.
 Viewed:  2639 Time(s)

fullsizeoutput_24aa.jpeg



fullsizeoutput_24a9.jpeg
 Mineral: Calcite on Dolomite
 Locality:
State Route 56 road cut, Canton, Washington County, Indiana, USA
 Dimensions: geode is about 18 cm calcites are 6 - 7 cm
 Description:
First or second year of exposure.
This example was about 4.5 meters up in the high wall
 Viewed:  2645 Time(s)

fullsizeoutput_24a9.jpeg



fullsizeoutput_24a8.jpeg
 Mineral: Calcite on Dolomite
 Locality:
State Route 56 road cut, Canton, Washington County, Indiana, USA
 Dimensions: geode is 18+ cm. The largest calcites are about 6 - 7 cm
 Description:
Third or fourth year of exposure. The geode is about 4.5 meters up on the high wall.

Note the splitting and fracturing of the surrounding dolostone matrix. These larger pieces can inflict serious injuries should they fall as you collect.

The next year or so the geode fell as multiple small pieces; unfortunately, it was never collected intact.
 Viewed:  2638 Time(s)

fullsizeoutput_24a8.jpeg


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Bob Harman




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PostPosted: Feb 14, 2017 14:23    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

The field and stream geodes from Washington County Indiana tend to be large and very large. This example is on display as part of a small geode collection in the geology building at Indiana University. As you can see it is immense in size and weighs 347 lbs. These have very limited collector appeal, only making good yard rocks or decorations such as this one. Interestingly, these very large examples tend to have very small central cavities and be dingy or rusty stained inside.

Several of the geodes on the poster are from my collection.



fullsizeoutput_21e.jpeg
 Mineral: Quartz
 Locality:
Washington County, Indiana, USA
 Description:
Quartz geode, NOS
On display in the Indiana University geology department
 Viewed:  2509 Time(s)

fullsizeoutput_21e.jpeg



fullsizeoutput_157.jpeg
 Mineral: Quartz
 Locality:
Washington County, Indiana, USA
 Description:
Quartz geode, NOS
This geode weighs 347 lbs.
 Viewed:  2509 Time(s)

fullsizeoutput_157.jpeg


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Bob Harman




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PostPosted: Feb 14, 2017 14:34    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

An example with more collector interest is this quartz geode containing a dominant and nicely placed and nicely terminated 6.5 cm baryte crystal nestled near the "back" of the quartz lining. A smaller partial crystal can be seen in the lower right area of the cavity


fullsizeoutput_24b2.jpeg
 Mineral: Baryte on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: Geode is 11cm, the baryte crystal is 6.5 cm
 Description:
Self-collected about 10 years ago at the Harrodsburg roadcuts. If culled out of the geode, examples such as these make for hi quality Midwest USA baryte specimens.
 Viewed:  2494 Time(s)

fullsizeoutput_24b2.jpeg


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PostPosted: Mar 14, 2017 15:36    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Found about 15 years ago, this aragonite consists of numerous white spiky needles on decayed ferroan dolomite in a geode cavity.


fullsizeoutput_24b5.jpeg
 Mineral: Aragonite on Dolomite (variety ferroan)
 Locality:
Monroe County, Indiana, USA
 Dimensions: the cavity is 11 cm x 5.5 cm the aragonite needles are up to 1.0 cm
 Description:
aragonite on decayed ferroan dolomite (limonite or ankerite?)
 Viewed:  2280 Time(s)

fullsizeoutput_24b5.jpeg


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PostPosted: Mar 29, 2017 10:34    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Finding fresh geodes in the limestone matrix is the way to go for dedicated collectors and finding "field and stream geodes" in creek beds is, for novices, very common, but explaining how the geodes weather out of the limestone to wind upon the creek beds is not so apparent. Finding geodes that are in the natural process of weathering out of their matrix is quite unusual. Here is one collected about 2005.


fullsizeoutput_24bc.jpeg
 Mineral: Quartz
 Locality:
Monroe County, Indiana, USA
 Dimensions: The geode is about 7 cm max dimension.
 Description:
quartz geode, NOS
 Viewed:  2089 Time(s)

fullsizeoutput_24bc.jpeg



fullsizeoutput_24bd.jpeg
 Mineral: Quartz
 Locality:
Monroe County, Indiana, USA
 Dimensions: the geode cavity is about 7 cm max dimension
 Description:
quartz geode, NOS
 Viewed:  2091 Time(s)

fullsizeoutput_24bd.jpeg


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PostPosted: Nov 11, 2017 11:05    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Bladed baryte on quartz


fullsizeoutput_22fc.jpeg
 Mineral: Baryte on Quartz
 Locality:
Monroe County, Indiana, USA
 Dimensions: Specimen is 8 cm. Baryte blades are up to 2.5 cm. The whole baryte area is 4.6 cm
 Description:
Self collected 2006
 Viewed:  797 Time(s)

fullsizeoutput_22fc.jpeg


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PostPosted: Nov 28, 2017 21:38    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

An intergrown group of baryte crystals with dolomite and calcites at the 5 - 6 o'clock position.


fullsizeoutput_2d9.jpeg
 Mineral: Baryte, Dolomite, and Calcite on Quartz
 Locality:
Monroe County, Indiana, USA
 Dimensions: geode is 9.5 cm
 Description:
Enlarging the photo shows several baryte crystal terminations radiating out from the center of the grouping.
Also enlarging the photo shows numerous micro marcasites or smythites within the baryte and calcite crystals. Acquired in 2009
 Viewed:  626 Time(s)

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PostPosted: Nov 29, 2017 17:32    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Collectible examples marcasite on quartz or dolomite are quite uncommon in Indiana.


fullsizeoutput_2777.jpeg
 Mineral: Marcasite on Dolomite on Quartz
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: The geode is 7.5 cm. The marcasite groupings are about 1.0 cm - 2.4 cm
 Description:
This example was self-collected in 2009.
 Viewed:  542 Time(s)

fullsizeoutput_2777.jpeg


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PostPosted: Nov 30, 2017 18:31    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Another well displayed baryte with multicolored dolomite groups on quartz


fullsizeoutput_247e.jpeg
 Mineral: Baryte and Dolomite on Quartz
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Description:
The baryte grouping is about 3.5 cm, best seen in the third photo. The multicolored dolomite groups are best seen in the 1st photo of the other half
Multiple terminated baryte crystals all radiating outward from the grouping's center. Micromarcasites or smythites in the baryte crystals. Self collected in 2014
 Viewed:  455 Time(s)

fullsizeoutput_247e.jpeg



fullsizeoutput_2742.jpeg
 Mineral: Baryte and Dolomite on Quartz
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: Baryte group is 3.5 cm.
 Description:
 Viewed:  455 Time(s)

fullsizeoutput_2742.jpeg



fullsizeoutput_247f.jpeg
 Mineral: Baryte and Dolomite on Quartz
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Description:
The baryte grouping is about 3.5 cm.
 Viewed:  457 Time(s)

fullsizeoutput_247f.jpeg


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PostPosted: Dec 01, 2017 21:50    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Several more examples of calcite. Left example is on quartz, the center example is on chalcedony variety of quartz and the example on the right is on dolomite. The unifying theme with these is that the calcite crystal nearly fills the cavity of each specimen, but never-the-less are terminated with no contact points on the visible surfaces.


fullsizeoutput_2779.jpeg
 Mineral: Calcite
 Locality:
Indiana, USA
 Dimensions: Calcites from 5 cm to 9 cm
 Description:
2 examples calcite on quartz and the example on the right is calcite on dolomite.
2 on the left from Monroe County; the example on the right from Washington County.
All self collected from 2008 to 2012
 Viewed:  383 Time(s)

fullsizeoutput_2779.jpeg



fullsizeoutput_7e.jpeg
 Mineral: Calcite on Dolomite
 Locality:
Washington County, Indiana, USA
 Dimensions: the calcite is 5 cm
 Description:
A rhombohedral crystal with both halves of the geode. Collected in 2012.
 Viewed:  382 Time(s)

fullsizeoutput_7e.jpeg


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PostPosted: Dec 02, 2017 21:12    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Another well displayed baryte cluster with a number of well terminated blades radiating outward from the cluster's center. Similar to the previously posted example with accompanying dolomite, but this example has only a small area of minor calcite and no marcasite or smythite inclusions in the baryte crystals. Acquired in 2010.


fullsizeoutput_2781.jpeg
 Mineral: Baryte and Dolomite on Quartz
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: The example is 10 cm. The baryte cluster is about 4.5 cm with the largest terminated blades about 1.3 cm
 Description:
 Viewed:  342 Time(s)

fullsizeoutput_2781.jpeg



fullsizeoutput_2780.jpeg
 Mineral: Baryte and Dolomite on Quartz
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: 10 cm.
 Description:
 Viewed:  341 Time(s)

fullsizeoutput_2780.jpeg


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PostPosted: Dec 03, 2017 20:29    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

When I started posting all these examples, I was undecided whether to post them in the "my collection" thread as some others do or in the thread of "a mineralogical trip thru the states of the USA". It was a toss up so all the photos and descriptions wound up into this thread of Indiana minerals.

This example was collected at a small road cut in March of 2013. The road cut along Indiana route 37, North of Bloomington, is now an extinct locality as the road is currently being upgraded to Interstate 69 and the cut was leveled and contoured just within the last several months.



fullsizeoutput_2784.jpeg
 Mineral: Sphalerite, Calcite and Dolomite with Quartz
 Locality:
Former State Route 37 road cuts, Bloomington (North), Monroe County, Indiana, USA
 Dimensions: Specimen is 12 cm. The sphalerite is up to 1 cm. The calcite is up to 1 cm.
 Description:
 Viewed:  260 Time(s)

fullsizeoutput_2784.jpeg



fullsizeoutput_2783.jpeg
 Mineral: Sphalerite, Calcite and Dolomite with Quartz
 Locality:
Former State Route 37 road cuts, Bloomington (North), Monroe County, Indiana, USA
 Dimensions: Specimen is 12 cm. The sphalerite is up to 1 cm. The calcite is up to 1 cm.
 Description:
 Viewed:  262 Time(s)

fullsizeoutput_2783.jpeg



fullsizeoutput_2631.jpeg
 Mineral: Sphalerite, Calcite and Dolomite with Quartz
 Locality:
Former State Route 37 road cuts, Bloomington (North), Monroe County, Indiana, USA
 Dimensions: Calcite up to 1 cm.
 Description:
 Viewed:  262 Time(s)

fullsizeoutput_2631.jpeg


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PostPosted: Dec 04, 2017 22:55    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

For Indiana mineral collectors a nice acicular spray of millerite is one of the holy grails of field collecting. These 2 very similar, but otherwise rather ordinary quartz geodes would not be worth saving except for the fact that both had the sprays of millerite within their central cavity.
Many a collector has opened examples like these at the roadside only to have the breeze of passing traffic blow the spray out of the cavity and away.
Self collected in 2014



fullsizeoutput_2786.jpeg
 Mineral: Millerite on Quartz
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: both examples are about 10 cm. The millerite strands are up to 3.0 cm
 Description:
millerite sprays on quartz
 Viewed:  187 Time(s)

fullsizeoutput_2786.jpeg



fullsizeoutput_2787.jpeg
 Mineral: Millerite on Quartz
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: acicular sprays up to 3.0 in a 10.0 cm geode.
 Description:
millerite sprays on quartz
 Viewed:  186 Time(s)

fullsizeoutput_2787.jpeg



fullsizeoutput_2788.jpeg
 Mineral: Millerite on Quartz
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: acicular sprays up to 3.0 cm in a 10.0 geode
 Description:
millerite sprays on quartz
 Viewed:  188 Time(s)

fullsizeoutput_2788.jpeg


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