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Post by jasoninsd on Dec 16, 2021 9:32:58 GMT -5
Beautiful stones, Jason! I can't really pick a favorite, but I really like the Burro Creeks and #5.
Undercutting happens on a lot of stones because of mixed hardnesses. Quartz as you know is a 7 and Chrysocolla is anywhere between 2 and 4. Without treating it, it's bound to have some undercutting. There is nothing wrong with that. It's how ma nature made it. Dino bone is also notorious for undercutting. It's extremely rare to find an untreated piece of gem bone that doesn't undercut around those cells. Lots of other stones, too, that I can't think of right now 'cuz I'm only on my first cup of coffee!  Thanks Robin!  I wasn't sure what to expect from the Burro Creek...but I do like that subdued purple tone it has. Okay. So I do understand "why" undercutting occurs, which like you stated is due to the variable hardness of the material within a stone... So, in the case of Evans ( knave) Dino Bone, the undercutting is going to happen no matter what, right? (Unless stabilized.) Now...if...and it's a massive "if"...a person were talented enough to shape a cabochon using nothing but "hard" wheels - meaning no padding behind the surface to allow pressure, wouldn't that enable the elimination of undercutting? Because isn't it the "play" in the padded wheels caused from pressure that actually creates the undercutting? If a person used only hard wheels, that would eliminate the variable pressure applied to the surface, such that all the varying densities of materials would receive equal pressure. However, I don't know of a lot of people talented enough to eliminate all the flat spots on a cab using hard wheels. That's why I think it may be "theoretically" possible, but not so much realistically...at least not for the majority of us... Just my thoughts on the subject... |
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Post by orrum on Dec 16, 2021 9:41:01 GMT -5
Man you have seriously got the skill set. I might stop hating Tommy and start hating you!!! LOL
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Post by knave on Dec 16, 2021 9:42:28 GMT -5
Might be worth another look at resin sintered.
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Post by knave on Dec 16, 2021 9:43:21 GMT -5
What’s the general size of these cabs ?
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Post by hummingbirdstones on Dec 16, 2021 9:56:25 GMT -5
Beautiful stones, Jason! I can't really pick a favorite, but I really like the Burro Creeks and #5.
Undercutting happens on a lot of stones because of mixed hardnesses. Quartz as you know is a 7 and Chrysocolla is anywhere between 2 and 4. Without treating it, it's bound to have some undercutting. There is nothing wrong with that. It's how ma nature made it. Dino bone is also notorious for undercutting. It's extremely rare to find an untreated piece of gem bone that doesn't undercut around those cells. Lots of other stones, too, that I can't think of right now 'cuz I'm only on my first cup of coffee! Thanks Robin! I wasn't sure what to expect from the Burro Creek...but I do like that subdued purple tone it has. Okay. So I do understand "why" undercutting occurs, which like you stated is due to the variable hardness of the material within a stone... So, in the case of Evans ( knave ) Dino Bone, the undercutting is going to happen no matter what, right? (Unless stabilized.) Now...if...and it's a massive "if"...a person were talented enough to shape a cabochon using nothing but "hard" wheels - meaning no padding behind the surface to allow pressure, wouldn't that enable the elimination of undercutting? Because isn't it the "play" in the padded wheels caused from pressure that actually creates the undercutting? If a person used only hard wheels, that would eliminate the variable pressure applied to the surface, such that all the varying densities of materials would receive equal pressure. However, I don't know of a lot of people talented enough to eliminate all the flat spots on a cab using hard wheels. That's why I think it may be "theoretically" possible, but not so much realistically...at least not for the majority of us... Just my thoughts on the subject... Truthfully, I don't know. It would seem to make sense that when you use hard wheels you would have less undercutting, but you still have the larger diamond grits that will gouge out the softer parts a little and you will still get undercutting. 
Personally, when I know I have something that may undercut, I try to skip the really coarse wheels if I can and use the lightest touch to shape and dome the stone. Takes more time to do a stone but even though I still may get some undercutting, it's not as pronounced. Just thinking out loud here.
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Post by jasoninsd on Dec 16, 2021 10:12:32 GMT -5
Man you have seriously got the skill set. I might stop hating Tommy and start hating you!!! LOL Thank you SO much...that really means a lot to me! Nah...you should still leave it on Tommy...I heard through the grapevine he as an aversion to kittens and puppies! LOL Might be worth another look at resin sintered. There's a thought... What’s the general size of these cabs ? The "majority" of my teardrop shapes are approximately 37mm x 22mm. There's one large teardrop Teepee Canyon Agate that's approximately 46mm x 28mm. Thanks Robin! I wasn't sure what to expect from the Burro Creek...but I do like that subdued purple tone it has. Okay. So I do understand "why" undercutting occurs, which like you stated is due to the variable hardness of the material within a stone... So, in the case of Evans ( knave ) Dino Bone, the undercutting is going to happen no matter what, right? (Unless stabilized.) Now...if...and it's a massive "if"...a person were talented enough to shape a cabochon using nothing but "hard" wheels - meaning no padding behind the surface to allow pressure, wouldn't that enable the elimination of undercutting? Because isn't it the "play" in the padded wheels caused from pressure that actually creates the undercutting? If a person used only hard wheels, that would eliminate the variable pressure applied to the surface, such that all the varying densities of materials would receive equal pressure. However, I don't know of a lot of people talented enough to eliminate all the flat spots on a cab using hard wheels. That's why I think it may be "theoretically" possible, but not so much realistically...at least not for the majority of us... Just my thoughts on the subject... Truthfully, I don't know. It would seem to make sense that when you use hard wheels you would have less undercutting, but you still have the larger diamond grits that will gouge out the softer parts a little and you will still get undercutting. 
Personally, when I know I have something that may undercut, I try to skip the really coarse wheels if I can and use the lightest touch to shape and dome the stone. Takes more time to do a stone but even though I still may get some undercutting, it's not as pronounced. Just thinking out loud here.
Great thoughts on this! I think this kind of thought process about this is fascinating. I know there's got to be a way to scientifically challenge the notion, but I don't believe most of us have the equipment to have a realistic go of figuring this out. Wait!!! We need Myth Busters to to do a comeback special! LOL |
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stewdogg
spending too much on rocks
Member since January 2020
Posts: 388
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Post by stewdogg on Dec 16, 2021 10:19:21 GMT -5
Those Teepees took a real nice shine on that new machine! Don't forget to eat, sleep and take a bathroom break once in a while. |
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Post by jasoninsd on Dec 16, 2021 10:21:57 GMT -5
Those Teepees took a real nice shine on that new machine! Don't forget to eat, sleep and take a bathroom break once in a while. Thanks my friend! 1. I need to lose a couple pounds. 2. Four hours a night is plenty, right? 3. There's a waste water bucket right next to the cabbing machine! LOL |
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stewdogg
spending too much on rocks
Member since January 2020
Posts: 388
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Post by stewdogg on Dec 16, 2021 10:25:36 GMT -5
Thanks my friend! 1. I need to lose a couple pounds. 2. Four hours a night is plenty, right? 3. There's a waste water bucket right next to the cabbing machine! LOL You don't need to lose those lbs till next spring. It's all about the make up nap sleep during the day. If you lived alone, I might actually believe #3...:LOL |
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Post by jasoninsd on Dec 16, 2021 10:31:01 GMT -5
Thanks my friend! 1. I need to lose a couple pounds. 2. Four hours a night is plenty, right? 3. There's a waste water bucket right next to the cabbing machine! LOL You don't need to lose those lbs till next spring. It's all about the make up nap sleep during the day. If you lived alone, I might actually believe #3...:LOL Country boys pee off the porch...just sayin'! LOL |
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Post by miket on Dec 16, 2021 10:39:13 GMT -5
Well, not that I didn't like your work before, but you've officially progressed to the point of me clicking the thumbs up before I even scroll through the cabs!
Seriously, you're creating some great work my friend!
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Post by knave on Dec 16, 2021 10:47:27 GMT -5
There yellow snow in winter off my porch. Even barefoot tracks as well
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Post by jasoninsd on Dec 16, 2021 17:25:09 GMT -5
Well, not that I didn't like your work before, but you've officially progressed to the point of me clicking the thumbs up before I even scroll through the cabs! Seriously, you're creating some great work my friend! Thanks my friend! That really mans a lot...very seriously, thank you for those kind words. There yellow snow in winter off my porch. Even barefoot tracks as well Well...then in the words of that great philosopher, Travis Tritt: The is the ONLY country club I'll belong to in this life! LOL |
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NDK
Cave Dweller 
Member since January 2009
Posts: 9,440
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Post by NDK on Dec 16, 2021 18:35:12 GMT -5
Love 'em all, Jason, especially the burro creek (don't believe I've worked that stuff before - need to dig some out of my stash), the chrysocolla & those deep colors in the teepees!
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Post by jasoninsd on Dec 16, 2021 19:04:12 GMT -5
Love 'em all, Jason, especially the burro creek (don't believe I've worked that stuff before - need to dig some out of my stash), the chrysocolla & those deep colors in the teepees! Thanks Nate! I really wasn't sure what to expect from that Burro Creek. It cut like a "normal" agate. The best way I can think to describe the way it looks in person is "silky"... And what's not to love about Teepees! LOL |
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CLErocks
spending too much on rocks
Member since October 2021
Posts: 342
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Post by CLErocks on Dec 16, 2021 20:16:58 GMT -5
1-3 7 & 12 AMAZING! all great, thanks for sharing.
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Post by jasoninsd on Dec 16, 2021 20:33:57 GMT -5
1-3 7 & 12 AMAZING! all great, thanks for sharing. Thanks Heather! I wouldn't guessed the Chrysocolla in Quartz would've been picked as a favorite by anyone...so thanks for not letting that one feel left out! |
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Post by holajonathan on Dec 16, 2021 22:19:15 GMT -5
Another great batch. I've some some of Madagacar Dendritic agate with those same little hollow tubes that run very deep into the rock. I was happy to hear that they don't look bad when they poke through the face of the cab. That gives me some motivation to try cabbing my slabs like that.
#11 looks like it's either got a thatched straw roof or an Amish boy's haircut.
#13 is one of my favorites of this batch. I think it is Cripple Creek picture jasper, although I also get confused about all the different Owyhee picture jaspers. The horizontal oval really works well for picture jaspers.
Finally, I think this size photo is great since your photos are taken up close and the cab pretty much fills the whole photo.
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Post by jasoninsd on Dec 16, 2021 22:39:32 GMT -5
Another great batch. I've some some of Madagacar Dendritic agate with those same little hollow tubes that run very deep into the rock. I was happy to hear that they don't look bad when they poke through the face of the cab. That gives me some motivation to try cabbing my slabs like that. #11 looks like it's either got a thatched straw roof or an Amish boy's haircut. #13 is one of my favorites of this batch. I think it is Cripple Creek picture jasper, although I also get confused about all the different Owyhee picture jaspers. The horizontal oval really works well for picture jaspers. Finally, I think this size photo is great since your photos are taken up close and the cab pretty much fills the whole photo. Thanks my friend! I've been siting on that MDA for quite awhile because I knew it wasn't going to have a "perfect" surface finish to it. I wasn't sure I wasn't going to use a stabilizer on it to try and fill in the empty tubes. I finally said to heck with it and figured if it turned out it turned out, and if not, then oh well. I know you've got a stabilizing kit coming your way, so this might be something to try. However, I actually like the looks of the empty tubes. It seems to work with this for some reason. Wabi Sabi. LOL - I'll agree with the haircut statement! LOL You are correct about it being Cripple Creek. I found the bag of preforms a couple hours ago. I have a massive rectangular piece of this that I know would be very unstable trying to cut it on the 10" saw. I may have to try some shims. It's a pretty cool piece with some great scenery to it. This has one of the best shines for picture jaspers...I know you were asking about that awhile back. |
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adrian65
Cave Dweller
Arch to golden memories and to great friends.
Member since February 2007
Posts: 10,789
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Post by adrian65 on Dec 16, 2021 23:09:52 GMT -5
A lot of beauties there, but the stage was taken by the dendritic Madagascar in pic 11. What a special pattern!
Adrian
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