Search Results
Nov 2007Using asetic acid to disolve limeston.Posted by Isaac Coblentz in Techniques for Collectors.I use vinegar to dissolve limestone/limy mudstone from silicate coral fossils. I usually scrape away the limestone/mud matrix, as it is dissolved figuring that this will speed up the process. I'm wondering if it is better to just let it sit for weeks changing the solution as needed and do any ...
Mar 2008Re: Making pigments or paint from mineralsReply from Isaac Coblentz in General.Im not a chemist, but from what I understand, The Acid Mine Drainage(AMD) in Athens, Ohio is caused by the groundwater reacting with sulfur compounds in the coal, both in the old mines and in gob piles, creating an acidic solution. The iron oxide is precipitated out of solutions into the creek bed ...
Mar 2008Re: Making pigments or paint from mineralsReply from Isaac Coblentz in General.A freind of mine has made three distinct earth tones ranging from a dark red, to brown to lighter browns by heat treating iron oxide. He collected Acid Mine Drainage(AMD) from a local creek, then cooked one batch at 250 degrees F. and another batch at 450-500 degrees F. The lightest brown came ...
Jul 2007Re: East Texas TreasuresReply from Isaac Coblentz in General.Curt, I put together this page of images and descriptions of the SE Ohio tree fern I collect. I still need to photograph my largest specimens, and others examples that illustrate the variability of specimens.....It's a work in ...
Jan 2007GIS MapingPosted by Isaac Coblentz in Field Collecting.I am curious if anyone else is using GIS (geographical information systems)to document collecting sites and using the data such as bedrock maps to find potential collecting sites? I am a novice GIS user, but have found it very hopefully in my personal research. I primarily use QGIS and Grass ...
Jul 2007Re: East Texas TreasuresReply from Isaac Coblentz in General.Thanks for sharing rob. I enjoyed looking at your specimens. I collect a lot of silicafied tree fern, in SE Ohio. The chalcedony, is usually a mixture of earth tones, mostly different shades of brown, creamy white and black, but I love finding them regardless. I found a tree fern root mass a few ...
Jan 2007Re: Rocks locations?Reply from Isaac Coblentz in General.Jolyon,
I am not qualified to say if the concretions I am finding are notable. Here is an image of a polished slab of the concretions in question. To me the concretion is notable for SE Ohio, because of it's lapidary potential. I also understand the desire to keep the database free of ...
Jan 2007Re: Book Suggestions?Reply from Isaac Coblentz in General.Barry,
"The Field Guid to Geology" updated edition by David Lambert and the Diagram Group has excellent basic descriptions. ($15 US) There is a chapter on "How rivers shape the land" and the "the work of ice and air". This book is an excellent geology primer, but it is not a comprehensive ...
Jan 2007Rocks locations?Posted by Isaac Coblentz in General.I am wondering if it is appropriate to list locations for rocks? I wanted to post a location for limestone septarian concretions, but don't know if this is appropriate or how I should classify it. E. H. Carlson, the author of Minerals of Ohio, did a few tests on the specimen and said the matrix ...
Jan 2007Re: Sodalite? Foyaite?Reply from Isaac Coblentz in Identity Help.oops bad links above.....
Sodalite
Sodalite 2
also, Im still learning how this site works, I was having log in problems, an unable to post so I tried to remedy the issue by changing my name.....it was originaly Isaac coblentz, then isaac, then copperweaver, but I have changed it back to my ...
Jan 2007Sodalite? Foyaite?Posted by Isaac Coblentz in Identity Help.Hello, My name is Isaac a.k.a copperweaver. I just started posting here.
- What "luster" does the mineral have? I would describe the luster as dull/waxy in most areas and sub-metalic in the dark charcoal gray/black area. The surface of the rock is well tumbled from wave action, so the ...
Feb 2007Re: Dravite??Reply from Isaac Coblentz in Identity Help.Thank you for the feedback. What both of you had to say is very helpful in my understandings of tourmaline, and rocks and minerals in general.
thank you
-Isaac
Jan 2007permiton to postPosted by Isaac Coblentz in How to Contribute.I would like to post images of hematite and petrified tree fern that I have collected in Athens Co, Ohio.
Here a few sample images of the hematite.
http://oak.cats.ohiou.edu/~ic420999/rocks.html
I will alter the images so they conform to mindat specs before uploading...
I am also ...
Feb 2007Dravite??Posted by Isaac Coblentz in Identity Help.I recently purchased several oz of tourmaline that were labeled black schorl. As I was examining them I noticed most of them had areas of color that were root beer brown and very dark green. A few pieces had a small area of pink or blue. Most of the specimens are opaque to somewhat transparent. A ...
