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GeneralMost amazing mineral in geodes.

2nd Jan 2007 11:25 UTCJamison K Turnbull

IÂ´ve seen lots of calcite and quartz in geodes but what is another mineral found in geodes? And what is the most amazing mineral you've seen in a geode?

3rd Jan 2007 07:50 UTCRay Hill Expert

My favourites are acicular, and in that class, I vote for Millerite from Hall's Gap.

3rd Jan 2007 15:04 UTCAlexander Ringel

Hello,

i know and heared from geodes from the Location Bebertal in Germany with

-Cinabarite

-Calcopyrite

-Pyrite

-Goethite (Crystals and glassy aggregtes)

-Lepidokrokite

-Hematite

-Siderite

-Barite

-Dolomite

Further i have seen or heared from:

-Fluorite (from Juchem Germany, green Crystals)

-Zeolithes (Natrolithe, Skolezite, and most other, many from India)

-Celestine (example from Ruedersdorf Germany, or Madagascar)

There must be much more, but i have many forgotten.

Greets

Alexander Ringel

3rd Jan 2007 17:14 UTCEverett Harrington Expert

As of lately,

Some of the best marcasite needles and reticulated crystals have been coming out of Jacob's geode mine in Hamilton IL. Harrodsburg IN has amazing yellow gemmy baryte blades included with a metalic mineral (prob marcasite). Millerite from Harrodsburg and Hall's gap is everyones favorite. Others include sphalerite, pyrite, dolomite, jarosite, stilpnosiderite, chalcopyrite, aragonite, goethite, smithsonite, malachite, hematite, pyrolucite and selentite from the midwest geodes. Mexican geodes host a whole slew of other minerals including 17 rare Fe and Mn oxides. Thie list of the minerals found in Mexican geodes (coconuts) not limited to but incude apatite carbonate, birnessite, calcite, chalcedony, cryptomelane, goethite, gypsum, hematite, kaolinite, opal, pyrolucite, quartz, ramsdellite, rancieite,and todorokite.

KOR

Everett

ref: Stephen Sinnote "Fabulous Keokuk Geodes" 1969

Min rec Sept-Oct 1972

4th Jan 2007 12:18 UTCHarjo Neutkens Manager

Very special whas the find of Erythrite in geodes from Juchem quarry, Fischbachtal, Germany.

Only found twice, the first find whas published in Lapis, the second one whas found by me and a friend of mine.

Also very nice Harmotome occurs in the Juchem geodes as well as those of the Freisen, Germany region.

I found a geode in the abandoned Vollmersbach quarry, Germany, containig very nice clear Baryte blades.

Cheers

Harjo

4th Jan 2007 12:33 UTCJolyon Ralph Founder

Those Galena geodes from Morocco are unbelievable!

Jolyon

4th Jan 2007 13:15 UTCMark Rheinberger

Hi,

I don't know about being amazing minerals, but some of the Indian zeolites and the Madagascan Celestine's sure can be very pretty.

Mark.

7th Jan 2007 12:04 UTCAlexander Ringel

Hello,

i know only faked Galena Geodes for tourists from Morocco . They are made of Crumbed Galena puttet in real geodes of bad quality, often with wood sticks that has a hull of broken crumbs and pieces of Galena. This looks like Stalaktites. Real natural galena Crystals does (nearly) never glitter in that inetensity like broken galena.

Greets

Alexander Ringel

7th Jan 2007 13:29 UTCJolyon Ralph Founder

Alexander,

That's why I said they were unbelievable :)

Jolyon

7th Jan 2007 22:14 UTCChuck Miller

I recently found a geode with hematite blades and needles from Kentucky.Thanks,Chuck

8th Jan 2007 01:16 UTCsteven garza

Evening, all;

How about sulfur, anhydrite, strontianite, anatase, & smythite.

Steve

8th Jan 2007 02:11 UTCJenna Mast

I saw a large cube of fluorite in a geode recently which I wouldn't mind giving a home to, and also I once saw a geode sprinkled with pyrite from the Keokuk region which is the only Keokuk geode I ever wanted.

8th Jan 2007 03:50 UTCRory R. Bain

I own a geode from mexico that has millerite needles throughtout it, also I have a samall reverse geode, and I had a German baryte geode which i traded for 1ct diamond, (I didnt used to like geodes)

8th Jan 2007 04:42 UTCEverett Harrington Expert

Steve you still kicking around down there in IN??

LOL

Everett

8th Jan 2007 05:05 UTCsteven garza

Hey, Everett;

You betcha! most quarries are closed; bt, geode locales are still producing strong. Keep me in mind for a trip.

Your friend, Steve

8th Jan 2007 05:19 UTCByron

Hey dont forgot about that rare Jamborite thats coming out of Harrodsburg. Ive got a picture of some in a geode i collected and sawed in half.

Byron

Ps long time no see Everett

9th Jan 2007 07:48 UTCsteven garza

Hi, Byron;

I don't know you, at least by name; Yes, we did forget the jamborite & honessite from there & environs, didn't we. I've several, myself; but, here's a Q for you; do you have the jamborite/millerite sprays INCLUDED in the calcite xls, that look like green stars inside same? Remind me before Greenfield show (I deal there in the outside pavilion) & I'll bring one for you to see. It's not really from that cut; BUT, it is close by!

Your friend, Steve

9th Jan 2007 08:35 UTCByron Thomas

Steve look at my gallery the picture im talking about is included in there. The Jamborite is not included IN the calcite it is sitting on a Quartz xtl. There is no calcite on the geode that has this Jamborite. When is the Greenfield show ill have to go there this year.

Byron

9th Jan 2007 16:50 UTCsteven garza

Hi, Byron;

Almost ALL the millerite & the jamborite xl sprays at this local are like this; darn few are actually ATTACHED to the quartz, though. As I've several geodes w/calcite partially dissolved that clearly show completely encased millerite sprays floating inside; I think most of the millerite at this locale originated from completely dissolved calcites bearing these sprays. The best sprays are from the "calcite hollows", which are the mashed & completely filled geodes w/the calcite & dolomite; selective acidizing can produce some AWESOME specimens of barite, sphalerite, pyrite/dolomite(!), millerite (any jamborite goes bye-bye), &, if you're REALLY lucky, one of those wierd yellow barites w/a purple top of celestite(!!). The best jamborites ARE attached to the quartz, with the millerite almost completely altered, in small cavities in these "calcite hollows"; these are a BRIGHT, almost fluorescent chartruse (mis-sp).

I'll have 3 at Greenwood, which is the 2nd weekend in Sept. & the show starts on Fri. at 10A; I'm usually not there (bcs I work late the night before) about 3P & stay the entire weekend. As I say, put a bug in my ear a week beforehand & they WILL be there. Come early Sat. & we can yak. If you want a trip( how far can you travel?), let me know. My E-ml addy is stevegarzain funny sign aol.com; feel free to contact me. Maybe an early viewing of my "mineral kingdom"?

Your friend, Steve

9th Jan 2007 17:01 UTCsteven garza

Hi, again, Byron;

Just saw your pic & that's typical of the jamborites, which have a substantial "heart" of unaltered millerite in the tight spaces; though, the best from that locale of the same sort are the fine sprays in the larger geodes that are usually loose; that's why I open my geodes at HOME! The best I've gotten of this type was a geode w/FOUR sprays, still attached to the sides of smoothly exsolved calcite xls (naturally).

Steve

9th Jan 2007 17:38 UTCJolyon Ralph Founder

I have a question about the Jamborites, but I'll ask it in a new topic.

Jolyon

9th Jan 2007 19:02 UTCChris Mavris Manager

The best geode of the day is right on my table: starring a hot macaroni mass with smoking tomato sauce...Should I have to put it in my showcase?Or better no?! :D

11th Jan 2007 02:08 UTCAlan Goldstein Expert

I've found so many geodes over the years it is hard to remember which ones I like the best. Many pix have been posted on mindat, but I've hardly started photographing the geodes in my collection!

I found a spectacular jamborite at Harrodsburg, IN several years ago. I've gotten some calcite and barite with starburst-like sprays of millerite completely inside them!

Some of my favorites are the pseudo-octahedral blue celestines and the petroleum-coated strontianite balls from KY Hwy 1638. The latter remind me of chocolate puff-balls. Steve, I've still got some big specimens in my garage that have never been trimmed!

I also like the amethystine quartz at Kings Mountain, KY - especially if it has calcite or bright blue celestine.

12th Jan 2007 22:28 UTCJenna Mast

Actually now that I think about it, the most amazing mineral I've seen in a geode is humanite.

It comes in two main varieties. One called girlite and one called boyite but I see a crystal of manite in there too.

http://www.crystalinks.com/crystalcave4.jpg

12th Jan 2007 22:31 UTCJenna Mast

Here's another example of this occurance in spain as well (the previous one was in Ohio). This particular specimen contains humanite of the very-manite variety.

http://giantcrystals.strahlen.org/europe/pilar2.jpg

15th Jan 2007 19:57 UTCRobert Knox

Although I'm a huge keokuk fan, my most amazing and beautiful geode comes from the Henry mountains of Utah. It has dozens of gemmy blue celestine blades rising up amongst rose-pink dogtooth calcites. Its a real stunner!

When I think back to the many keokuks I seen or opened, there were some incredable examples of marcasite sprays to 16mm, or malacite on chalcopyrite that have impressed me. Its the quartzes and calcites, however, that excite me the most from the these geodes. I love the double pyramidal quartz on white chalcendony that they refere to as "diamond dewdrop". It is found as tiny water clear or the larger smokey colored gemmy quartz dipyramids. The brown psudo-cubic calcites covered with an irridesant layer of stilpnosiderite and in later stages, with pink dogtooth calcites and finally white nailhead calcites, are also amoung the favorites geodes in my collection.

Bob

5th Jul 2014 21:00 UTCBob Harman

A number of unusually encountered minerals occur in Indiana geodes. Many of these are actually pictured and described in the "Midwest Sedimentary Geode" thread to conclusively prove this point. These geode minerals include fluorite, strontianite, honnessite/jamborite, chalcopyrite, malachite, hematite, goethite and smythite (the only mineral first named from an Indiana occurrence). Also various crusts, clay minerals and other dingy appearing manganese and iron oxides occur. See that thread for the pictures of these and the more familiar secondary minerals occurring in Indiana geodes.

CHEERS……BOB

11th Jul 2014 17:27 UTCMike Mangrum

Woodbury geodes contain dolomite, pyrite, sulfur, chalcopyrite, fluorite, anglesite, and celestite. The most unusual, in my opinion is the oil included stuff, which includes fluorite, quartz and calcite. These are jet black. This is not a coating, but contained inside the crystal.

See pic.

s1366.photobucket.com/user/rocksinthehead/media/IMG_0047_zps415fb1d9.jpg.html

16th Jul 2014 23:16 UTCAnne Pols

Anyone talking about geodes anymore? I have been looking for someone in Grand Rapids and surrounding areas to speak with on this subject. I have a geode that is filled with citrine diamond crystals. I have another geode that looks identical outside, like cauliflower, but I will not break it open. It weighs 15 lbs more than the other geode. A total of 45 lbs. Is there a way, or place, to scan the geode without changing its appearance? Thank you to anyone for your help.

17th Jul 2014 02:08 UTCBob Harman

ANNE , There is no true citrine in Indiana geodes, just "citrine colored" iron stained quartz crystals in the geodes. There is no way that I know of to accurately scan the inside of an unbroken geode without actually breaking it open.

For a lot more on this whole subject I refer you to the topic of "MIDWEST SEDIMENTARY GEODES" on this website. There are 19 pages of pictures and descriptions. Citrine coloration is discussed toward the top of page 4 and the middle of page 7. "Cauliflower" geode outsides are shown in several pages including the bottom of pages 8 and 11. CHEERS…..BOB

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