Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,484
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Post by Sabre52 on Jul 9, 2014 8:12:07 GMT -5
Howdy folks, Ok just more poppies but this time I thought I'd show the change in pattern as my saw progresses through a hunk of that small orb poppy from the poison oak section of the strawberry jasper vein. These cuts are sequential cuts parallel to the vein. Thanks for looking.....Mel The first cut, very strawberry jasper in nature: Next cuts, getting more orbs. This is my favorite pattern. Totally orby now: Final cut, less orbs and pockets of sparkly hematite crystals in little agate cysts. Couple of cabs showing how the vein is arranged if you cut perpendicular to the vein: parallel cabs: Not as solid as the slabs I just cut so I hope to be able to replace tis cab in my collection with another one from this new stuff. Finally, a couple of cuts off a red piece of Cosmos jasper. Various Cosmos Jasper cabs:
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panamark
fully equipped rock polisher
Member since September 2012
Posts: 1,343
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Post by panamark on Jul 9, 2014 10:38:16 GMT -5
Ha, somehow I thought maybe the first was a picture of your skin after the poison oak. The things we do for rocks.
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jamesp
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Post by jamesp on Jul 9, 2014 11:20:50 GMT -5
Can't have enough orbs, so the parallels are my favs, but could be persuaded to favor the cross cuts. The Cosmo is stellar.
The orb agates look like a pretty culture in a petri dish, like a blood sample with issues.
Some agates should sell by the carat...
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luvtogrow
starting to spend too much on rocks
Member since November 2012
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Post by luvtogrow on Jul 9, 2014 13:54:29 GMT -5
Makes my old heart skip a beat! Super beautiful, fracture free poppyj. My wife cracked up about your doctor showing off the poison oak. Probably not funny back then.
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Post by snowmom on Jul 9, 2014 15:24:58 GMT -5
loved that! really strawberry-ish... that first one would make a great heart cab... cool how you showed the changes as you went through it. It help to see how cuts progress. I imagine it takes a good bit of experience to know how to orient your rock to make the cuts...
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,484
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Post by Sabre52 on Jul 9, 2014 17:05:00 GMT -5
snowmom, It's not too difficult deciding how you want to cut but man, getting the rock oriented and into the vice correctly so it will not break loose during the cut can be a booger. I often have to do a little chipping with the rock hammer to get a flat spot that will hold in the vice. I've got a beauty sitting by the saw right now that is triangular and will not stick in the dang vice. So nice I don't want to chip it but it looks like I will have to....Mel
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moonmopus
starting to shine!
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Post by moonmopus on Jul 9, 2014 17:32:21 GMT -5
Can't have enough orbs, so the parallels are my favs, but could be persuaded to favor the cross cuts. The Cosmo is stellar. The orb agates look like a pretty culture in a petri dish, like a blood sample with issues. Some agates should sell by the carat... mel, these are great. it is helpful for folks like me to see how so much experimentation pays creative dividends. do you always try multiple orientations when cutting or does it depend on what you are working with? jamesp, you're right. more microbiological than cosmic, isn't it?
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Sabre52
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Me and my gal, Rosie
Member since August 2005
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Post by Sabre52 on Jul 9, 2014 18:06:38 GMT -5
moonmopus: I don't always try multiple orientations but with banded materials, I do it a lot. It's amazing how cutting a bit different angle to the bands can give a slab an entirely different look......Mel
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moonmopus
starting to shine!
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Post by moonmopus on Jul 9, 2014 19:30:28 GMT -5
moonmopus: I don't always try multiple orientations but with banded materials, I do it a lot. It's amazing how cutting a bit different angle to the bands can give a slab an entirely different look......Mel yeah, that's what's killing me when i look at threads like this one. seem to be a lot of ways to skin this proverbial cat. looking at what you've done has given me just one more reason to get set up with a saw and flat lap. thanks for posting this. btw, are you the same mel who co-authored the north american agate and jasper series? if so, thank you.
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Sabre52
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Me and my gal, Rosie
Member since August 2005
Posts: 20,484
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Post by Sabre52 on Jul 9, 2014 20:31:20 GMT -5
moon: Yes, that would be me but really it is Lowell's baby and you're welcome from both of us. I had developed an agate/jasper ID picture notebook I was using for my own interests but he developed the concept of expanding it to an online index and is the driving force behind the project with all the computer/desktop publishing savvy. I can barely use a computer *L*. My contributions are mainly of a scientific nature as it involves identifications, catagorization, locations, some photography from my collection etc. And, also we've received a lot of help with specimen pics and information from our board members, for which Lowell and I are very thankful. Glad you've enjoyed our little project.....Mel
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moonmopus
starting to shine!
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Post by moonmopus on Jul 9, 2014 21:14:22 GMT -5
moon: Yes, that would be me but really it is Lowell's baby and you're welcome from both of us. I had developed an agate/jasper ID picture notebook I was using for my own interests but he developed the concept of expanding it to an online index and is the driving force behind the project with all the computer/desktop publishing savvy. I can barely use a computer *L*. My contributions are mainly of a scientific nature as it involves identifications, catagorization, locations, some photography from my collection etc. And, also we've received a lot of help with specimen pics and information from our board members, for which Lowell and I are very thankful. Glad you've enjoyed our little project.....Mel it's exceptional and saved me throwing needless id questions for some of my rocks at the board.
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Post by 1dave on Jul 10, 2014 10:48:07 GMT -5
Definitely spheroidal crystallization. That requires temperatures around 1,000oC and water around 3% and enough pressure to keep it from expanding into steam. Layers with more water lowers the viscosity of that layer - like adding marbles - and that creates the "flow lines" allowing silica molecules to get together that is normally impossible to form the spheres. Inner perthite spheres are clearly visible. Amazing and delicious stuff!
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Deleted
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Post by Deleted on Jul 10, 2014 14:19:46 GMT -5
Mel, thanks for continuing the poppyJ saga. Those stones are all amazing. Donald Kasper observes that poppyJ's all happen at the intersection of three seismic fault lines. Your photos are, well, delicious! (oops Dave used that adjective too!) 1dave I wonder how many atmospheres of pressure it takes to keep water from boiling at 1,000 oC? I little googling tells that at 200Bar pressure water boils at ~266 oC, 300Bar pressure water boils at ~620 oC, if it's a linear progression (edited to add:it cannot be!) then perhaps we'll have liquid water at somewhere near 400bar (roughly 6000psi). Can anyone shed some light on this?
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Post by 1dave on Jul 10, 2014 23:24:24 GMT -5
Mel, thanks for continuing the poppyJ saga. Those stones are all amazing. Donald Kasper observes that poppyJ's all happen at the intersection of three seismic fault lines. Your photos are, well, delicious! (oops Dave used that adjective too!) 1dave I wonder how many atmospheres of pressure it takes to keep water from boiling at 1,000 oC? I little googling tells that at 200Bar pressure water boils at ~266 oC, 300Bar pressure water boils at ~620 oC, if it's a linear progression (edited to add:it cannot be!) then perhaps we'll have liquid water at somewhere near 400bar (roughly 6000psi). Can anyone shed some light on this? It seems water also lowers the temperature of crystallization so the needles may form at a cooler temperature than appears in the literature. From absolute zero to ? all atoms keep changing their electron configuration in repeating patterns. With each expansion or contraction of oxygen, then silica, the crystals have to adjust their shapes in semi-repeating structures, but at different densities. Needles are formed when electrons are kicked out one end of the molecule and another is sucked in on the opposite end. These form spheroids. I still have not found any information on what silica does at room temperature and cooler, just that alkali dissolves it and acid forces it out of solution - but in what configuration?
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Deleted
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Post by Deleted on Jul 10, 2014 23:32:22 GMT -5
I still have not found any information on what silica does at room temperature and cooler, just that alkali dissolves it and acid forces it out of solution - but in what configuration? I am hoping to answer this question by end of this year. Been working on it over a year. Recently gained some new perspective. New round of experiment starts next week.
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Post by 1dave on Jul 10, 2014 23:38:37 GMT -5
I still have not found any information on what silica does at room temperature and cooler, just that alkali dissolves it and acid forces it out of solution - but in what configuration? I am hoping to answer this question by end of this year. Been working on it over a year. Recently gained some new perspective. New round of experiment starts next week. COOL! Experiments are what is needed. Please keep us informed!
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Deleted
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Post by Deleted on Jul 10, 2014 23:42:34 GMT -5
I am hoping to answer this question by end of this year. Been working on it over a year. Recently gained some new perspective. New round of experiment starts next week. COOL! Experiments are what is needed. Please keep us informed! The shadow of darkness prevails while experiments yield knowledge through failure. Only success lifts the Vail.
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herchenx
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Post by herchenx on Jul 11, 2014 0:27:36 GMT -5
Dang Mel those are nice, and great cabs!
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,484
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Post by Sabre52 on Jul 11, 2014 7:56:11 GMT -5
Thanks all!
John, I can't take credit for all the cabs. That first kind of wavy triangle one was cut from some of my material by Brian ( Beefjello) I think. He did it on his wheels but had a tough time with the shine. I threw it in my vibe and it came out mirror bright. It's odd but the Hunters Valley material actually seems to do better as a tumble cab than it does on the wheels. I too have had trouble with the final polish on my pads.
Scott, you and Dave are too much. All that higher chemistry. My lack of aptitude in chemistry is the reason I didn't become a large animal vet *L*..Mel
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Deleted
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Post by Deleted on Jul 15, 2014 22:17:34 GMT -5
Scott, you and Dave are too much. All that higher chemistry. My lack of aptitude in chemistry is the reason I didn't become a large animal vet *L*..Mel ahh shucks Mel. In truth, the ambient temperature chemistry I am playing with is pretty simple stuff. High school chemlab level. It's 1dave's high temp, high pressure chemistry that alludes me (and most folks I am sure). He is the real star here.
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