jamesp
Cave Dweller 
Member since October 2012
Posts: 36,607
|
Post by jamesp on May 29, 2018 9:31:40 GMT -5
Makes sense because the reflection seems to be when looking at the layers from the top or bottom and not from the stacked view. With the layers, I get it. Thanks. I noticed MsAli 's chunk has swirls, would that make bands of sheen when cut through the swirls ? I'm not sure which type that chunk is. There are so many different kinds of obsidian. I've seen the sheen obsidians with swirls in it, so you get the black with beautiful ribbons of sheen instead of one large sheet of sheen. I have a few different types that have the swirly patterns in them. Mahogany, midnight lace, red ribbon and fire obsidian all have swirls. Interesting stuff.
Glass Buttes definitely has the right kind of volcano. Basically to form obsidian, it needs a really high silica content.
I was curious if the swirls do what you mentioned. I am starting to understand the mechanics now. I do have a collection based on buying different varieties and thru trades and gifts. Must be a dozen with different characteristics so I am overwhelmed by the variety. txrockhunter took some of the most amazing micro photos of the patterns in obsidian. let me see if I can find them Robin.     More: forum.rocktumblinghobby.com/thread/82337/tumble-macros-pic-heavy?page=1 |
|
|
|
Post by hummingbirdstones on May 29, 2018 9:41:58 GMT -5
Gorgeous stuff. You can get lost looking into some of it.
|
|
Fossilman
Cave Dweller
Member since January 2009
Posts: 20,723 
|
Post by Fossilman on May 29, 2018 9:42:13 GMT -5
Triple and double flow mahogany Obsidian, turns out the best patterns with any Obsidian, as pictured above....
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,607
|
Post by jamesp on May 29, 2018 9:43:57 GMT -5
Kris Rowe is the guy I am learning from. Its his daughters place. Garrick is her boyfriend and is Kris's partner. Sounds like you have made perfect obsidian contacts. I am admitting to jealousy. Well done. I would HAVE to see it in the natural state on site as it occurs in the ground. I was wandering around Arizona completely in a desert fog and blown away by the surroundings. Rock book says to look for a certain pinnacle(butte ? volcanic shaft ?). It said to collect apache tears within a like 2 mile radius of where the old volcano spewed them into the air many moons ago. Me thinking hog wash. Sure as hell, the ground was littered with apache tears within that radius of that shaft. Exit the radius specified and the apache tears were no longer on the ground. What would it be like to have molten blobs of volcanic glass rain down on you ? could cause skin problems.. |
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,607
|
Post by jamesp on May 29, 2018 9:45:02 GMT -5
Triple and double flow mahogany Obsidian, turns out the best patterns with any Obsidian, as pictured above.... About time you reared your head glassbutteman. |
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,607
|
Post by jamesp on May 29, 2018 9:46:01 GMT -5
Gorgeous stuff. You can get lost looking into some of it. The curtain photo must be shown to the glass blower. That one would twist his brain. I will tell him I did it in the kiln to get a rise. |
|
|
|
Post by hummingbirdstones on May 29, 2018 9:53:31 GMT -5
Gorgeous stuff. You can get lost looking into some of it. The curtain photo must be shown to the glass blower. That one would twist his brain. I will tell him I did it in the kiln to get a rise.
Mother nature makes the best patterns. That's why we all get inspiration and copy her!
|
|
|
|
Post by MsAli on May 29, 2018 10:20:35 GMT -5
Kris Rowe is the guy I am learning from. Its his daughters place. Garrick is her boyfriend and is Kris's partner. Sounds like you have made perfect obsidian contacts. I am admitting to jealousy. Well done. I would HAVE to see it in the natural state on site as it occurs in the ground. I was wandering around Arizona completely in a desert fog and blown away by the surroundings. Rock book says to look for a certain pinnacle(butte ? volcanic shaft ?). It said to collect apache tears within a like 2 mile radius of where the old volcano spewed them into the air many moons ago. Me thinking hog wash. Sure as hell, the ground was littered with apache tears within that radius of that shaft. Exit the radius specified and the apache tears were no longer on the ground. What would it be like to have molten blobs of volcanic glass rain down on you ? could cause skin problems.. One day I will get out on a field trip with them Billy sent me a bunch of little Apache Tears, found out they were one of my grandmas favorite. Been doing some jewelry pieces with them and got to reading about them yesterday, Quite a story behind them. Now I know why she loved them.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,607
|
Post by jamesp on May 29, 2018 18:31:07 GMT -5
The curtain photo must be shown to the glass blower. That one would twist his brain. I will tell him I did it in the kiln to get a rise. Mother nature makes the best patterns. That's why we all get inspiration and copy her!
Our rocks are testimony to that. Agates especially with their many signature patterns. Complex mathematical patterns too. |
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,607
|
Post by jamesp on May 29, 2018 18:37:20 GMT -5
Sounds like you have made perfect obsidian contacts. I am admitting to jealousy. Well done. I would HAVE to see it in the natural state on site as it occurs in the ground. I was wandering around Arizona completely in a desert fog and blown away by the surroundings. Rock book says to look for a certain pinnacle(butte ? volcanic shaft ?). It said to collect apache tears within a like 2 mile radius of where the old volcano spewed them into the air many moons ago. Me thinking hog wash. Sure as hell, the ground was littered with apache tears within that radius of that shaft. Exit the radius specified and the apache tears were no longer on the ground. What would it be like to have molten blobs of volcanic glass rain down on you ? could cause skin problems.. One day I will get out on a field trip with them Billy sent me a bunch of little Apache Tears, found out they were one of my grandmas favorite. Been doing some jewelry pieces with them and got to reading about them yesterday, Quite a story behind them. Now I know why she loved them.
I hope you take photos on that field trip. I don't remember anyone doing an obsidian trip on the forum. Tears are unusual. I believe they cooled on their return from being blasted high in the air. |
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,607
|
Post by jamesp on May 29, 2018 19:17:43 GMT -5
Thanks for cutting tips MsAli quartz rockpickerforever hummingbirdstones quartz 1daveI think I hit the sweet spot in the 2 slabs above. The chunk at lower left is the view of the layers. I am guessing that the middle layer with no banding may not produce sheen.  Black section with no banding, figuring this section will have no sheen to offer.  |
|
|
|
Post by 1dave on May 29, 2018 19:23:42 GMT -5
One day I will get out on a field trip with them Billy sent me a bunch of little Apache Tears, found out they were one of my grandmas favorite. Been doing some jewelry pieces with them and got to reading about them yesterday, Quite a story behind them. Now I know why she loved them.
I hope you take photos on that field trip. I don't remember anyone doing an obsidian trip on the forum. Tears are unusual. I believe they cooled on their return from being blasted high in the air. We visited the location near superior Arizona on our honeymoon in 1961. www.waymarking.com/waymarks/WMB0QD_Apache_Tears_near_Superior_ArizonaThe obsidian flowed as normal EXCEPT there was a lot of water in it. The water caused many tiny fractures in the obsidian, turning it to perlite. The "tears" have shells of perlite around them where the water got lesser and lesser, and finally not penetrating the space where the tears remain obsidian.  |
|
|
|
Post by hummingbirdstones on May 29, 2018 19:34:48 GMT -5
I think I see a very faint line going through the middle of all that black. May want to check just to be sure. 
Yup, you got that orientation all figured out.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,607
|
Post by jamesp on May 29, 2018 19:48:47 GMT -5
I think I see a very faint line going through the middle of all that black. May want to check just to be sure. Yup, you got that orientation all figured out.
So the lines do carry the reflectivity. This was a 14 pound chunk. Maybe 50% is real nice sheen, the other seems like plain black. I have some smaller pieces of sheen and some seem to 'sheen' more than others. amazing |
|
|
|
Post by MsAli on May 29, 2018 19:48:59 GMT -5
Thanks for cutting tips MsAli quartz rockpickerforever hummingbirdstones quartz 1dave I think I hit the sweet spot in the 2 slabs above. The chunk at lower left is the view of the layers. I am guessing that the middle layer with no banding may not produce sheen. Black section with no banding, figuring this section will have no sheen to offer. Oh my😍 |
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,607
|
Post by jamesp on May 29, 2018 19:54:04 GMT -5
I hope you take photos on that field trip. I don't remember anyone doing an obsidian trip on the forum. Tears are unusual. I believe they cooled on their return from being blasted high in the air. We visited the location near superior Arizona on our honeymoon in 1961. www.waymarking.com/waymarks/WMB0QD_Apache_Tears_near_Superior_ArizonaThe obsidian flowed as normal EXCEPT there was a lot of water in it. The water caused many tiny fractures in the obsidian, turning it to perlite. The "tears" have shells of perlite around them where the water got lesser and lesser, and finally not penetrating the space where the tears remain obsidian. Totally interesting Dave, thanks for sharing. Perlite a fine high heat insulator. |
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,607
|
Post by jamesp on May 29, 2018 19:56:23 GMT -5
I will cut some cabs MsAli and tumble hard to taper a dome shape, hoping for lots of sheen fireworks. |
|
|
|
Post by MsAli on May 29, 2018 20:06:23 GMT -5
I will cut some cabs MsAli and tumble hard to taper a dome shape, hoping for lots of sheen fireworks. I cannot wait to see how this tumbles |
|
|
|
Post by hummingbirdstones on May 29, 2018 20:55:30 GMT -5
I think I see a very faint line going through the middle of all that black. May want to check just to be sure. Yup, you got that orientation all figured out.
So the lines do carry the reflectivity. This was a 14 pound chunk. Maybe 50% is real nice sheen, the other seems like plain black. I have some smaller pieces of sheen and some seem to 'sheen' more than others. amazing Sometimes at least. I know the fire obsidian lines can sometimes be really thin like that. Doesn't hurt to check. |
|
|
|
Post by hummingbirdstones on May 29, 2018 22:37:36 GMT -5
<img src="//storage.proboards.com/forum/images/bbcode/video-preview.png" video="<iframe width="560" height="315" src=" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>" alt="Video Preview">
|
|
