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Indiana Geode Questions

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herb
spending too much on rocks

Member since November 2011
Posts: 476

Indiana Geode Questions Aug 23, 2020 15:21:35 GMT -5

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Post by herb on Aug 23, 2020 15:21:35 GMT -5

Hi everyone,

I have a dozen or so geodes that are supposed to be from Indiana. I've sliced a few in half and started to grind one on my vibratory flat lap in order to polish it. This is what I found towards the end of the 200 grit grinding stage:

IndianaGeode by Shiny Objects, on Flickr

Obviously a bummer to see one of the halves had fallen apart. Is there anything special that has to be considered when flat lapping these? They seem rather soft, so I was hoping they'd be easy to polish. I noticed that when cleaning the oil off from the saw, the water was very brown. Even when sitting wet for awhile, I noticed when I picked one up the water puddle underneath was quiet brown like the rock is dissolving from being in contact with water. Is this normal for these geodes, or do I just have some inferior geodes? Are there any tricks that can help me end up with polished halves instead of pieces?

Thanks!
Herb

www.pandajewels.com/opencart

kyoti has rocks in the head Member since June 2020 Posts: 542	Indiana Geode Questions Aug 23, 2020 17:52:50 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by kyoti on Aug 23, 2020 17:52:50 GMT -5 My Arkansas geode was the same way. It was too fragile to polish and crumbled a bit when I tried. I wondered if there is a way to stabilize the fragile geodes.

herb
spending too much on rocks

Member since November 2011
Posts: 476

Indiana Geode Questions Aug 24, 2020 9:32:59 GMT -5 via mobile kyoti likes this

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Post by herb on Aug 24, 2020 9:32:59 GMT -5

Aug 23, 2020 17:52:50 GMT -5 kyoti said:

My Arkansas geode was the same way. It was too fragile to polish and crumbled a bit when I tried. I wondered if there is a way to stabilize the fragile geodes.

I wondered also if there was a way to stabilize them. I dont know of anything that would work without leaving the surface looking artificial. Epoxy, for instance would leave the surface with an unnatural shine.

www.pandajewels.com/opencart

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Welcome to the Rock Tumbling Hobby Forum where we share a love of rocks and a sense of community as enduring as the stones we polish. The RTH Forum of www.RockTumbling.com is an Amazon Associate site and we earn money from qualifying purchases you make after clicking on our links such as this Rock Tumbling Supplies on Amazon link for instance, or any of our various product ads and banners. By clicking our links every time you begin your Amazon shopping experience, you are generating a bit of revenue for the forum which helps us cover our expenses. Thank you for your support!