rocknewb101
fully equipped rock polisher
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Post by rocknewb101 on Feb 16, 2024 20:47:32 GMT -5
These two are the bigger thundereggs I shared earlier - they are quite hefty so I think they are solid. How should I cut these? With or against this 'crack'   and then how about this one? Does it matter?  Then just thought I'd share the pretty green of this chrysoprase - Is that top part useable?  Thank you! |
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Post by HankRocks on Feb 16, 2024 20:52:40 GMT -5
My opinion is that the first one is a double, I would cut across the(perpendicular) the join line. If it is a double you will get a view of what is inside of both.
One thing about cutting geodes, you have one shot at it. Good luck.
Henry
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dillonf
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Post by dillonf on Feb 16, 2024 20:52:40 GMT -5
I'd cut it perpendicular to that seam. In hopes you get a double geode!
That second one . . . Not sure? Along the longest surface.
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Post by aDave on Feb 16, 2024 21:27:58 GMT -5
I am no expert on these things, but I'll pose a question to the more knowing. In the second photo, is that a faint seam that appears to go from the 6 on a clock face to a 12 on a clock face? If so, would that impact cut direction? I took the photo and drew around what I'm referring to.  |
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realrockhound
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Post by realrockhound on Feb 16, 2024 22:50:13 GMT -5
Cut it long ways
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rocknewb101
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Post by rocknewb101 on Feb 17, 2024 7:50:12 GMT -5
My opinion is that the first one is a double, I would cut across the(perpendicular) the join line. If it is a double you will get a view of what is inside of both. One thing about cutting geodes, you have one shot at it. Good luck. Henry That was my initial thought too! Awesome - Fingers Crossed!! Thank you so much!! I'd cut it perpendicular to that seam. In hopes you get a double geode! That second one . . . Not sure? Along the longest surface. Perfect! Thank you. Let's hope that's the case! I am no expert on these things, but I'll pose a question to the more knowing. In the second photo, is that a faint seam that appears to go from the 6 on a clock face to a 12 on a clock face? If so, would that impact cut direction? I took the photo and drew around what I'm referring to. I also see what you are seeing. There's a very possible line there - I think I'll do the same with this one and cut across it. Thank you! Thank you! I will do that for both of them  |
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dillonf
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Post by dillonf on Feb 17, 2024 7:58:27 GMT -5
To make it a bit more fun I'm going to predict that you actually have some hollow cavities in that double! Here's to hoping!  |
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rockbrain
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Post by rockbrain on Feb 17, 2024 9:25:43 GMT -5
Some of them I've cut I do slightly off center. Then cut a slice off the larger one to make them equal. You end up with 2 slightly smaller "halves" to make your pair, but you also get a slice! Wouldn't want to do it on small ones, but on larger ones I usually don't notice the difference but end up with a slab.
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dshanpnw
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Post by dshanpnw on Feb 18, 2024 14:10:43 GMT -5
The chrysoprase is very nice. Not sure about the matrix being usable though. I would have said to cut parallel along the crack, but that was before I heard it could be a double.
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rocknewb101
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Post by rocknewb101 on Feb 19, 2024 8:14:37 GMT -5
To make it a bit more fun I'm going to predict that you actually have some hollow cavities in that double! Here's to hoping!  Let's hope!! Fingers crossed!! Of course now my saw is down - need to replace bearings and peen my blade. Hope to be able to share soon!! Some of them I've cut I do slightly off center. Then cut a slice off the larger one to make them equal. You end up with 2 slightly smaller "halves" to make your pair, but you also get a slice! Wouldn't want to do it on small ones, but on larger ones I usually don't notice the difference but end up with a slab. That's not a bad idea! I did cut a smaller one and it was hollow - cut it off center though so thinking I might do another cut to see if I can use any of the material. I'll share another pic of that one...surprised me.. The chrysoprase is very nice. Not sure about the matrix being usable though. I would have said to cut parallel along the crack, but that was before I heard it could be a double. Thanks!! I wasn't thinking the matrix could be used either - it's a little holey. Should have no trouble making something out of the green though. I wish we got a do-over on the cut lol...just in case |
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rocknewb101
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Post by rocknewb101 on Feb 19, 2024 8:35:11 GMT -5
These are the two smaller 'eggs' I cut into before we realized my saw had a wobble and hubby determined bearings look bad (will have to wait on the bigger eggs) Bearings are in and need replaced, and need to peen the blade before cutting... This first had an interesting outer - looked conglomerate-like but lots of dendrites on the inside - have no clue what this could be   then the smaller one, was a double geode - cut just a hair short of middle, but want to try and get another slice to open up the geode part. Pretty green material - again, no clue what this is but fun to cut into.   |
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wpotterw
spending too much on rocks
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Post by wpotterw on Feb 19, 2024 10:26:30 GMT -5
These are the two smaller 'eggs' I cut into before we realized my saw had a wobble and hubby determined bearings look bad (will have to wait on the bigger eggs) Bearings are in and need replaced, and need to peen the blade before cutting... This first had an interesting outer - looked conglomerate-like but lots of dendrites on the inside - have no clue what this could be The first one looks like a coprolite inside and outside. |
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rocknewb101
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Post by rocknewb101 on Feb 19, 2024 11:09:13 GMT -5
These are the two smaller 'eggs' I cut into before we realized my saw had a wobble and hubby determined bearings look bad (will have to wait on the bigger eggs) Bearings are in and need replaced, and need to peen the blade before cutting... This first had an interesting outer - looked conglomerate-like but lots of dendrites on the inside - have no clue what this could be The first one looks like a coprolite inside and outside. Oooh! It does look like some of the coprolite ends I received from an RTH member! Interesting!! I'll have to compare more closely to see if I have any other that looks like this - thanks! |
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dshanpnw
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Post by dshanpnw on Feb 20, 2024 9:23:22 GMT -5
To make it a bit more fun I'm going to predict that you actually have some hollow cavities in that double! Here's to hoping! Let's hope!! Fingers crossed!! Of course now my saw is down - need to replace bearings and peen my blade. Hope to be able to share soon!! Some of them I've cut I do slightly off center. Then cut a slice off the larger one to make them equal. You end up with 2 slightly smaller "halves" to make your pair, but you also get a slice! Wouldn't want to do it on small ones, but on larger ones I usually don't notice the difference but end up with a slab. That's not a bad idea! I did cut a smaller one and it was hollow - cut it off center though so thinking I might do another cut to see if I can use any of the material. I'll share another pic of that one...surprised me.. The chrysoprase is very nice. Not sure about the matrix being usable though. I would have said to cut parallel along the crack, but that was before I heard it could be a double. Thanks!! I wasn't thinking the matrix could be used either - it's a little holey. Should have no trouble making something out of the green though. I wish we got a do-over on the cut lol...just in case There are no do-overs. I think that a lot. |
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dshanpnw
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Post by dshanpnw on Feb 20, 2024 9:29:48 GMT -5
I was thinking the second looks a little like spiderweb jasper (rhyolite). Hope you get the saw working properly.
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rocknewb101
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Post by rocknewb101 on Feb 20, 2024 10:26:34 GMT -5
I was thinking the second looks a little like spiderweb jasper (rhyolite). Hope you get the saw working properly. Oh, very possible! It's quite pretty.. Thank you! I hope so too! got the new bearings and hubby found an appropriate file to peen the blade so thinking we should (hopefully) be up and running this weekend. I do need to do a clean out, but it's way too cold for that! |
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rocknewb101
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Post by rocknewb101 on Mar 3, 2024 8:52:55 GMT -5
 Was able to get this beauty cut open. Surprise! I don't think this is a thunderegg and def not a geode - agate nodule then? It seems to have pretty blueish banding around the outer with the nice crystally middle. Am going to make a slab to see if color stands out better. |
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Post by HankRocks on Mar 3, 2024 10:41:44 GMT -5
It does appear to be a Choyas geode, it's just that it filled in during it's formation. Contrary to the popular definition Geodes/Thundereggs do not always have hollow centers. The solid ones can form in the same beds as the hollow ones.
Henry
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rocknewb101
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Post by rocknewb101 on Mar 4, 2024 19:57:40 GMT -5
It does appear to be a Choyas geode, it's just that it filled in during it's formation. Contrary to the popular definition Geodes/Thundereggs do not always have hollow centers. The solid ones can form in the same beds as the hollow ones. Henry Ahh - that's interesting - thank you! I didn't realize. I always thought a geode was hollow and thunderegg was filled - but starlike in the center. You can almost see where entry points were here Thanks!! |
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dillonf
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Post by dillonf on Mar 4, 2024 21:00:13 GMT -5
Was able to get this beauty cut open. Surprise! I don't think this is a thunderegg and def not a geode - agate nodule then? It seems to have pretty blueish banding around the outer with the nice crystally middle. Am going to make a slab to see if color stands out better. Is that the single or the double? |
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