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




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PostPosted: Aug 04, 2016 15:51    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

A trip thru South Central Indiana shows geodes have uses other than usual indoor display specimens on counter tops or shelves. These pix show geodes as yard and garden decorations or as other outside decorations.


DSC02216.JPG
 Mineral: _Quartz
 Locality:
Monroe County, Indiana, USA
 Description:
Yard decoration, Bloomington Indiana
 Viewed:  14222 Time(s)

DSC02216.JPG



DSC02386.JPG
 Mineral: _Quartz
 Locality:
Monroe County, Indiana, USA
 Description:
Unopened large geode as a decoration on a driveway post, Bloomington Indiana
 Viewed:  14191 Time(s)

DSC02386.JPG



DSC02387.JPG
 Mineral: _Quartz
 Locality:
Monroe County, Indiana, USA
 Description:
Large unopened geode as an ornament on a driveway post. Bloomington Indiana
 Viewed:  14192 Time(s)

DSC02387.JPG



DSCF2330.JPG
 Mineral: _Quartz
 Locality:
Monroe County, Indiana, USA
 Description:
Front porch ornaments, Bloomington Indiana
 Viewed:  14213 Time(s)

DSCF2330.JPG


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Bob Harman




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PostPosted: Aug 12, 2016 14:05    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Two more examples of Baryte from the rte 37 Harrodsburg road cuts, Monroe County Indiana. While these are geodes, they display like simple cabinet size specimens.


DSC03958.jpg
 Mineral: Barite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: specimen is 11 cm, barites are 3.8 cm
 Description:
The Barytes are strongly color zoned with micromarcasite inclusions
 Viewed:  14144 Time(s)

DSC03958.jpg



DSC03957.jpg
 Mineral: Barite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: barites are 3.8 cm
 Description:
strongly color zoned with micromarcasite inclusions
 Viewed:  14152 Time(s)

DSC03957.jpg



DSC03836.jpg
 Mineral: Barite and Dolomite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: specimen is 10 cm, barites are 3 cm and the dolomite groupings are 1 cm
 Description:
 Viewed:  14148 Time(s)

DSC03836.jpg


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Matt_Zukowski
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PostPosted: Aug 12, 2016 14:22    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

What is the blue on DSC03836? Celestine?
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Bob Harman




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PostPosted: Aug 12, 2016 14:33    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

HI MATT, The gold in Indiana celestines, I believe, is really really small micro marcasites, but not sure what the blue is. The celestines from Michigan and Ohio are also often blue, but I am also not sure what causes the blue color in all the examples. BOB
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Bob Harman




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PostPosted: Aug 12, 2016 14:56    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Two more examples from the rte 56 road cuts in Washington County Indiana. The first example shows both halves and each can be also be displayed as a simple cabinet size specimen rather than a geode.


DSC02939.jpg
 Mineral: Calcite with Marcasite inclusions on Dolomite
 Locality:
State Route 56 road cut, Canton, Washington County, Indiana, USA
 Dimensions: specimen is 9 cm, the calcites are up to 1.2 cm
 Description:
the micromarcasites are rather large, resembling pepper sprinkled into the calcites.
 Viewed:  14140 Time(s)

DSC02939.jpg



DSC02943.jpg
 Mineral: Marcasite in Calcite on Dolomite
 Locality:
State Route 56 road cut, Canton, Washington County, Indiana, USA
 Dimensions: specimen is 9 cm, the calcites are up to 1.2 cm
 Description:
Micromarcasites in calcite on dolomite.
As seen upon close inspection, the micromarcasites are on the dolomite and included within the overlying calcites
 Viewed:  14110 Time(s)

DSC02943.jpg



DSC03199.jpg
 Mineral: Calcite and Sphalerite on Dolomite
 Locality:
State Route 56 road cut, Canton, Washington County, Indiana, USA
 Dimensions: geode is about 20 cm x 9 cm
 Description:
the largest calcite is about 4.5 cmthe largest intact sphalerite is about 2.0 cm
 Viewed:  14162 Time(s)

DSC03199.jpg


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Bob Harman




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PostPosted: Aug 17, 2016 10:38    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Two more examples of Aragonite from a lakeshore locality in southern Monroe County Indiana. Most aragonite in Indiana occurs in "old" geodes along with decaying ferroan dolomite so it is noteworthy that the first example does not.

Both examples were self collected. The first one was collected in 2009 the second was collected in 2012.



DSC02159.jpg
 Mineral: Aragonite on Quartz
 Locality:
Monroe County, Indiana, USA
 Dimensions: oval geode is 12cm x 7cm. The aragonite sprays range from 1.3cm to 3.5cm
 Description:
 Viewed:  14036 Time(s)

DSC02159.jpg



DSC02168.jpg
 Mineral: Aragonite on Quartz
 Locality:
Monroe County, Indiana, USA
 Dimensions: oval geode is 12cm x 7cm. The aragonite sprays range from 1.3cm to 3.5cm
 Description:
Aragonite on quartz (the other half of the previous geode)
 Viewed:  14043 Time(s)

DSC02168.jpg



DSC02149.jpg
 Mineral: Aragonite and Dolomite (variety ferroan dolomite) on Quartz
 Locality:
Monroe County, Indiana, USA
 Dimensions: geode is 11cm in diameter. The aragonite sprays range from 2cm to 3.5cm
 Description:
Aragonite and decaying ferroan dolomite on quartz
 Viewed:  14026 Time(s)

DSC02149.jpg


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Bob Harman




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PostPosted: Aug 31, 2016 10:26    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Hematite on quartz. In Indiana, quartz is largely found as crystal tips and small occasionally well formed (sometimes doubly terminated) crystals in geodes. Infrequently it is also found in quarries as druzy linings in cavities.

To my knowledge, the largest well formed Indiana quartz crystals are doubly terminated examples about 1 cm.



DSC02095.jpg
 Mineral: Hematite on Quartz
 Locality:
Monroe County, Indiana, USA
 Dimensions: about 10cm x 8cm the cavity
 Description:
 Viewed:  13797 Time(s)

DSC02095.jpg


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Bob Harman




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PostPosted: Sep 28, 2016 20:09    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Ideally acicular sprays of millerite should be free standing into the cavity of the vug or geode, but in reality many sprays are completely enclosed in surrounding calcite and rarely in Baryte. These 3 examples have been culled from Indiana geodes. The 2 on the right are within calcites and the one yellowish example on the left has been culled from a Baryte crystal.


DSC03651.jpg
 Mineral: Millerite in Calcite and Barite
 Locality:
Monroe County, Indiana, USA
 Dimensions: The millerite spays are up to 2 cm
 Description:
The small bluish area in the left side Baryte example is from mounting tack when the example was displayed
 Viewed:  13655 Time(s)

DSC03651.jpg


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Bob Harman




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PostPosted: Oct 01, 2016 12:19    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Another example of bicolor celestine from Washington County.


DSC03433.jpg
 Mineral: Celestine on Quartz
 Locality:
Hoosier Stone Company Salem (Salem Quarry), Salem, Washington County, Indiana, USA
 Dimensions: the geode is about 11 cm x 7 cm and the celestine is 4.5 cm
 Description:
bicolor celestine on quartz
 Viewed:  13600 Time(s)

DSC03433.jpg



DSC03424.JPG
 Mineral: Celestine on Quartz
 Locality:
Hoosier Stone Company Salem (Salem Quarry), Salem, Washington County, Indiana, USA
 Dimensions: celestine is 4.5 cm
 Description:
bicolor celestine on quartz
 Viewed:  13586 Time(s)

DSC03424.JPG


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Pierre Joubert




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PostPosted: Oct 01, 2016 13:30    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Very nice specimens Bob, more so because they are self collected.
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PostPosted: Oct 02, 2016 14:40    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Two additional examples. The first can be seen to include its surrounding limestone matrix.

The very freshest finds either include the matrix or are extracted from it. This example is an interesting Baryte crystal with different shaped phantoms than the final terminated crystal. The Baryte is surrounded by dolomite groupings, all on quartz. Self collected about 2007.

The second example is a well displayed large geode with complex inter-grown calcites, dolomite and Baryte. One of the larger calcites near the middle of the cavity is doubly terminated. Collected in the 1990s.



DSC02330.jpg
 Mineral: Barite and Dolomite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: geode cavity is 13 cm x 10 cm. barite crystal is 5 cm and dolomite groupings are up to 4.5 cm
 Description:
 Viewed:  13484 Time(s)

DSC02330.jpg



DSC02349.jpg
 Mineral: Calcite, Barite and Dolomite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: geode is 22 cm x 18 cm. The largest doubly terminated calcite (near the cavity center) is 7 cm
 Description:
 Viewed:  13497 Time(s)

DSC02349.jpg



DSC02348.jpg
 Mineral: Calcite, Dolomite, Barite and Sphalerite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: the largest doubly terminated calcite is 7 cm
 Description:
calcite, dolomite, Baryte and a small sphalerite on quartz
 Viewed:  13527 Time(s)

DSC02348.jpg


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Bob Harman




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PostPosted: Oct 18, 2016 19:36    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Many forms of calcite can be found throughout Indiana. These 2 examples have well formed crystals covered by a crust. The crust is either aragonite or kaolinite.


fullsizeoutput_22f6.jpeg
 Mineral: Aragonite or Kaolinite on Calcite on Quartz
 Locality:
Monroe County, Indiana, USA
 Dimensions: Geode is 8 cm. The Calcite is 2 cm
 Description:
self collected about 2009
 Viewed:  13255 Time(s)

fullsizeoutput_22f6.jpeg



fullsizeoutput_22f2.jpeg
 Mineral: Aragonite or Kaolinite on Calcite on Quartz
 Locality:
Monroe County, Indiana, USA
 Dimensions: Geode is 10 cm. the larger of the 2 Calcites is 2.5 cm
 Description:
Self collected about 2008
 Viewed:  13271 Time(s)

fullsizeoutput_22f2.jpeg


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Jamison Brizendine




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PostPosted: Oct 19, 2016 10:05    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Last weekend I attended my tenth year college reunion at Earlham College in Richmond, Indiana. I met with one of my old geology professors and several new professors teaching at the college.

I also had an opportunity to view the "rock room" where they store specimens. Unfortunately, many specimens are missing provenance information or lack any labels. The college recently hired a new curator to organize the collection and give it the attention that it needs. The fossil collection though, is meticulously organized and labeled as several professors personally collected this material.

I did find a few specimens that I thought were worthy of being photographed and shared and this was one of them that I wanted to share.

Ansel Gooding (1924 - 1976) was a geologist whose specialty was Pleistocene geology in eastern Indiana. This specimen was personally collected by him in Spring 1966. The major city near here is Louisville, Kentucky.

Considering that there are a few mineral specimens from here (or on Mindat), I thought it was a worthy candidate.



R-1-445, Calcite vug in Coral, Jeffersonville Limestone, Louisville Cement Co Quarry, Clark County, Indiana, Collected by Ansel Gooding Spring 1966, 7.5 x 5.8 x 5.5 cm.JPG
 Mineral: Calcite
 Locality:
Louisville Cement Company Quarry, Clark County, Indiana, USA
 Dimensions: 7.5 x 5.8 x 5.5 cm
 Description:
A calcite vug in fossilized coral from the Jeffersonville Formation. Collected by Earlham College professor, Ansel Gooding in Spring 1966.
 Viewed:  13219 Time(s)

R-1-445, Calcite vug in Coral, Jeffersonville Limestone, Louisville Cement Co Quarry, Clark County, Indiana,  Collected by Ansel Gooding Spring 1966, 7.5 x 5.8 x 5.5 cm.JPG


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Bob Harman




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PostPosted: Oct 30, 2016 15:54    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

An interesting large geode with calcites, barite and iron rich dolomite groupings. Nicely opened and very well displayed. The other half is mainly quartz.


fullsizeoutput_230b.jpeg
 Mineral: Calcite, Barite, Dolomite (variety iron rich dolomite) on Quartz
 Locality:
Mission Valley Ravine, Monroe County, Indiana, USA
 Dimensions: geode is 22 cm x 22 cm. The largest calcite is 4.5 cm. The barite groupings are up to 5.0 cm. The dolomite groupings are up to 4.0 cm
 Description:
 Viewed:  13035 Time(s)

fullsizeoutput_230b.jpeg


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Bob Harman




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PostPosted: Nov 08, 2016 13:59    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Experienced geode collectors can usually tell if an unopened example is hollow or solid. This is especially true if the cavity is large. Large examples with small central cavities can be difficult, if not impossible, to tell from solid examples. Hollow examples are decidedly light in weight compared to their size. What cannot be determined prior to opening the example, is the orientation of any secondary mineral crystals within the cavity. Opening the geode becomes "the luck of the draw" so to speak; sometimes the crystals remain intact and other times the break is right thru collectible crystals breaking or cleaving them. This large example had several intergrown calcites. A couple of rhombohedral crystals remained intact while one was cleaved by the opening of the geode.


fullsizeoutput_231b.jpeg
 Mineral: Calcite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: geode is about 17 cm, the largest intact calcites are 4.8 cm and 7.0 cm
 Description:
 Viewed:  12882 Time(s)

fullsizeoutput_231b.jpeg



fullsizeoutput_2318.jpeg
 Mineral: Calcite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: the largest intact calcite in this picture is 4.8 cm
 Description:
 Viewed:  12885 Time(s)

fullsizeoutput_2318.jpeg



fullsizeoutput_231c.jpeg
 Mineral: Calcite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: the largest intact calcite, seen on end at the 6 o'clock position, in this picture is 7.0 cm
 Description:
 Viewed:  12928 Time(s)

fullsizeoutput_231c.jpeg


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Bob Harman




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PostPosted: Nov 15, 2016 15:11    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

I have already shown a couple of examples of doubly terminated BARYTE crystals in Indiana geodes. Here are a couple of additional examples.


fullsizeoutput_317.jpeg
 Mineral: Baryte and Dolomite on Quartz
 Locality:
Harrodsburg area, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: 12 cm with the grouping being 5 cm and the largest Baryte being 2 cm
 Description:
 Viewed:  12768 Time(s)

fullsizeoutput_317.jpeg



DSC03930.JPG
 Mineral: Baryte and Dolomite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: the largest Baryte is 2 cm
 Description:
Microcrystals of Marcasite and/or Smythites in the Baryte
 Viewed:  12781 Time(s)

DSC03930.JPG



fullsizeoutput_1b8.jpeg
 Mineral: Baryte and Dolomite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: Baryte is 2 cm
 Description:
Microcrystals of Marcasites or Smythites within the Barite
 Viewed:  12791 Time(s)

fullsizeoutput_1b8.jpeg



fullsizeoutput_21f.jpeg
 Mineral: Baryte on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: Geode is about 8 cm. The Baryte are up to 1.8 cm. Marcasites and/or Smythites micro in the Baryte
 Description:
 Viewed:  12770 Time(s)

fullsizeoutput_21f.jpeg


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Bob Harman




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PostPosted: Dec 14, 2016 13:57    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

this example was found in 2013 at the Indiana rte 56 road cuts. More of a "specimen" than a geode.


fullsizeoutput_233.jpeg
 Mineral: Calcite on Dolomite
 Locality:
State Route 56 road cut, Canton, Washington County, Indiana, USA
 Dimensions: 14 cm x 14 cm. the calcites 1 cm - 4 cm
 Description:
self collected in 2013
 Viewed:  12399 Time(s)

fullsizeoutput_233.jpeg



fullsizeoutput_1585.jpeg
 Mineral: Calcite on Dolomite
 Locality:
State Route 56 road cut, Canton, Washington County, Indiana, USA
 Dimensions: 14 cm x 14 cm. the calcites are 1 cm - 4 cm
 Description:
self collected in 2013
 Viewed:  12403 Time(s)

fullsizeoutput_1585.jpeg


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Bob Harman




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PostPosted: Dec 14, 2016 14:29    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

Barite and dolomite on quartz. Acquired from Dan Weinrich minerals about 8 - 10 years ago. Not very often that I find a hi quality Indiana geode available.


fullsizeoutput_2309.jpeg
 Mineral: Barite and Dolomite on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: 6 cm with the group of intergrown barites about 4 cm
 Description:
The barites are lustrous and pristine.
Hard to see, but the tips are all intact.
Again more of a "specimen" than a geode.
 Viewed:  12382 Time(s)

fullsizeoutput_2309.jpeg


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Bob Harman




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PostPosted: Dec 23, 2016 13:33    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

The mineral calcite, CaCO3, is very commonly found in the Midwest both in geodes and other occurrences, but the equally simple carbonate mineral rhodochrosite, MnCO3, is, to my knowledge, never found in the sedimentary environment of Midwest geodes and nearby non-geode occurrences. Manganese is otherwise rather common as its oxides including "wad". These 2 carbonate minerals must form under very different conditions.
Several Midwest geode locations, however, do host occasional finds of manganese rich calcite crystals (or manganoan calcites.....are they the same????). Sheffler's Geode Mine in Missouri is, perhaps, the best known locality. An example is shown as part of the state of Missouri mineral specimens.
This example is from Monroe County Indiana and a very rare occurrence as I have never seen another quite so pink.



fullsizeoutput_22c.jpeg
 Mineral: Dolomite and Calcite (variety manganese rich) on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: quartz geode is 7 cm. the calcite is 5 cm
 Description:
the pink color is within the calcite and not on the crystal surface
 Viewed:  12106 Time(s)

fullsizeoutput_22c.jpeg



fullsizeoutput_188.jpeg
 Mineral: Dolomite and Calcite (variety manganese rich) on Quartz
 Locality:
State Route 37 road cuts, Harrodsburg, Clear Creek Township, Monroe County, Indiana, USA
 Dimensions: geode is 7 cm and the main calcite is 5 cm
 Description:
note the very small 3 mm pink accessory calcites in addition to the main calcite
 Viewed:  12073 Time(s)

fullsizeoutput_188.jpeg


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Tobi




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PostPosted: Dec 24, 2016 04:53    Post subject: Re: A mineralogical trip through the states of USA - Indiana  

A very beautiful calcite specimen, Bob. At first sight, it reminded me of a pink fluorite ;-)
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