|
|
Post by woodman on Jul 13, 2018 18:48:08 GMT -5
Thought I would share a couple of photos for those new to the hobby that have never seen triple flow obsidian. Both photos are the same slab.   |
|
|
|
Post by HankRocks on Jul 13, 2018 18:52:26 GMT -5
Could you explain "triple flow"
Thanks
|
|
|
|
Post by MsAli on Jul 13, 2018 19:04:26 GMT -5
It is really incredible
|
|
|
|
Post by woodman on Jul 13, 2018 19:31:14 GMT -5
Could you explain "triple flow" Thanks Sure, notice in the first photo that you see black and mahogany , in the second photo you see the clear sections. So you have three flows black, mahogany and clear blended together. Hence tripe flow. If it was just the black and mahogany, it would be called double flow. my photos do not do it justice. |
|
|
|
Post by HankRocks on Jul 13, 2018 20:08:12 GMT -5
Ok I understand. I have some I cut that looks to be somewhat similar. Will try and wet it and take some pictures tomorrow in the sun and post.
|
|
|
|
Post by woodman on Jul 13, 2018 21:00:12 GMT -5
Ok I understand. I have some I cut that looks to be somewhat similar. Will try and wet it and take some pictures tomorrow in the sun and post. Quite often you can not see the clear until you hold it up to the sun or bright light, what appears to be double, may be triple flow. |
|
Fossilman
Cave Dweller 
Member since January 2009
Posts: 20,723 
|
Post by Fossilman on Jul 14, 2018 8:14:45 GMT -5
Love hounding and cutting that material... Nice piece you have there... I have some wicked pieces off of Coons claim also...(Glass Butts)..
|
|
|
|
Post by HankRocks on Jul 14, 2018 12:30:45 GMT -5
Ok here's 3 Obsidian slabs I cut a couple weeks ago, not sure what type. The last one has a lot of the gold? or silver? sheen to it if it catches the light just right. (pardon the pictures, I can't stand the new hi-tech digital cameras, too automatic, give me my old 35mm film camera with all manual settings any day)  DSC_0239 by Findrocks, on Flickr  DSC_0234 by Findrocks, on Flickr  DSC_0233 by Findrocks, on Flickr |
|
|
|
Post by woodman on Jul 14, 2018 13:17:24 GMT -5
Ok here's 3 Obsidian slabs I cut a couple weeks ago, not sure what type. The last one has a lot of the gold? or silver? sheen to it if it catches the light just right. (pardon the pictures, I can't stand the new hi-tech digital cameras, too automatic, give me my old 35mm film camera with all manual settings any day) DSC_0239 by Findrocks, on Flickr DSC_0234 by Findrocks, on Flickr DSC_0233 by Findrocks, on Flickr Triple flow at least, possible gold sheen or silver sheen. What ever, they are some great slabs. I would have to tend to keep them as they or just polish them as speciums. I like the new digital cameras and would never want to go back to my old ones. You don't have to use the automatic settings on most of them. I take a lot of bad pictures but it costs me nothing to just delete them and take more. yours are not ad at all in MHO. better than mine by far. I have seen the term "midnight lace" used with this material. |
|
|
|
Post by HankRocks on Jul 14, 2018 14:25:05 GMT -5
I have two full buckets of Obsidian mostly in the 1 to 2 pound range. There are 3 or 4 more 6 to 8 pounders that look similar to these in my "to-be-cut" queue. Unfortunately(fortunately?) there are a lot of rocks in the queue!!
A couple of these would make some awesome spheres!
So many rocks, so little time.
|
|
OregonBorn
noticing nice landscape pebbles
Member since September 2015
Posts: 88
|
Post by OregonBorn on Jul 14, 2018 18:35:49 GMT -5
Ok here's 3 Obsidian slabs I cut a couple weeks ago, not sure what type. The last one has a lot of the gold? or silver? sheen to it if it catches the light just right. (pardon the pictures, I can't stand the new hi-tech digital cameras, too automatic, give me my old 35mm film camera with all manual settings any day) Top photo is a combination double flow and midnight lace. I suppose it could also be called triple flow. Generally triple flow is black, read and clear, and double flow is red and clear or black and clear. Clear is a variable in opacity. Depending on the color of the clear, these may also be root beer. Hard to tell with the green lawn in the background. It could also be what I call grape soda with a purple tint (lots of both at Glass Buttes). Or just clear. No authority on these names that I have found, it varies quite a lot.
Second photo is a combination of triple flow and tiger stripe, with a few strands of midnight lace. If you cut the tiger stripe section more parallel to the stripes, it may also show gold sheen. If you cut gold or silver sheen perpendicular to the layers, it will not show the sheen.
Third photo is triple flow midnight lace and gold sheen. The top section is almost lizzard skin or spider web. Hard to tell with the glare.
Agreed on the 35mm camera vs digital, but I do not shoot with film any more. I have a Nikon digital setup with a high end zoom lens, and it does OK.
|
|
|
|
Post by HankRocks on Jul 14, 2018 21:36:00 GMT -5
Thanks for all the explanations.
And I thought I was buying a couple buckets of plain old Obsidian. Had no idea it could be so varied. The Thread about a month ago which talked about Rainbow sheen alerted me to dig into the the buckets and cut a few. Glad I did.
Think I will move any future photos indoors, especially with any translucence involved
|
|
|
|
Post by woodman on Jul 14, 2018 21:49:18 GMT -5
Nothing wrong with your outdoor photos, but see what you get inside and compare them. I do both depending on how much of a hurry I am in or what I am photographing. I only have 1 piece of rainbow laying around here someplace.
|
|
|
|
Post by MsAli on Jul 14, 2018 23:24:39 GMT -5
Ok here's 3 Obsidian slabs I cut a couple weeks ago, not sure what type. The last one has a lot of the gold? or silver? sheen to it if it catches the light just right. (pardon the pictures, I can't stand the new hi-tech digital cameras, too automatic, give me my old 35mm film camera with all manual settings any day) DSC_0239 by Findrocks, on Flickr DSC_0234 by Findrocks, on Flickr DSC_0233 by Findrocks, on Flickr All beautiful but that top one is outstanding! |
|
OregonBorn
noticing nice landscape pebbles
Member since September 2015
Posts: 88
|
Post by OregonBorn on Jul 15, 2018 18:12:31 GMT -5
What you have cut there is not plain old obsidian. "Plain" obsidian is typically all uniform and all black. There are lots of types of what is called rainbow obsidian. Also there are related color types like aurora or peacock obsidian. I had the best piece of peacock obsidian in my hands at the Prineville Pow Wow a few years ago, and I put it back on the sale table. Read: mistake! I should have bought it.
Several types of rainbow obsidian include the streaky flow color line rainbow from places like Glass Buttes. You have to cut that stuff just right to get the best effect. Also there is Davis Creek rainbow that shows rainbow colors from all angles, like aurora obsidian. Many call aurora obsidian rainbow, but it tends to have blue-green to purple colors, and it is usually more solid in color or bi-color. Then there is bullseye rainbow, which shows colors in circles if cut and polished right. Then you can get rainbow effects in clear (or root beer/grape) and tri-flow obsidian if cut right or held up to the light just right. Its a prism effect that you are seeing in rainbow. Variable colors of light are refracted, depending on the type of obsidian and the cut, as well as light angle. Glass also makes a prism if cut right. Obsidian is basically glass (SiO2) with other minerals in it. Glass (and obsidian) is created when SiO2 cools too fast and it cannot form crystalline structures. Quartz is also SiO2, but has had ample time to form stable crystals. Agate is also SiO2, but has a different and less stable noncrystalline structure than quartz.
|
|
|
|
Post by HankRocks on Jul 15, 2018 20:23:03 GMT -5
What you have cut there is not plain old obsidian. "Plain" obsidian is typically all uniform and all black. There are lots of types of what is called rainbow obsidian. Also there are related color types like aurora or peacock obsidian. I had the best piece of peacock obsidian in my hands at the Prineville Pow Wow a few years ago, and I put it back on the sale table. Read: mistake! I should have bought it. Several types of rainbow obsidian include the streaky flow color line rainbow from places like Glass Buttes. You have to cut that stuff just right to get the best effect. Also there is Davis Creek rainbow that shows rainbow colors from all angles, like aurora obsidian. Many call aurora obsidian rainbow, but it tends to have blue-green to purple colors, and it is usually more solid in color or bi-color. Then there is bullseye rainbow, which shows colors in circles if cut and polished right. Then you can get rainbow effects in clear (or root beer/grape) and tri-flow obsidian if cut right or held up to the light just right. Its a prism effect that you are seeing in rainbow. Variable colors of light are refracted, depending on the type of obsidian and the cut, as well as light angle. Glass also makes a prism if cut right. Obsidian is basically glass (SiO2) with other minerals in it. Glass (and obsidian) is created when SiO2 cools too fast and it cannot form crystalline structures. Quartz is also SiO2, but has had ample time to form stable crystals. Agate is also SiO2, but has a different and less stable noncrystalline structure than quartz. I will need to re-read this tomorrow. Been going for 11 hours; breaking down one large compost pile and spreading it at community garden, mowing and edging my yard and most of the afternoon hooking up an irrigation system in a freshly plowed field for a 5 acre Corm Maze, two beers and this old boy is ready for a shower and bed. |
|
OregonBorn
noticing nice landscape pebbles
Member since September 2015
Posts: 88
|
Post by OregonBorn on Jul 15, 2018 21:30:45 GMT -5
No hurry.
I just cut up a bunch of gold sheen obsidian this afternoon to dress out my new 303 MK Diamond blade. I found a layer of previously unseen clear in the stack of red and black in the rock. Then I cut that one too thick to see through the clear. But the gold sheen and swirl pattern on the other side is nice enough to make a cab from. This gold sheen rock looked like just another piece of mahogany that I collected at Glass Buttes 3 years ago. Man, what perty pieces I got. I played with the angle of the cuts some, and got some interesting results. I 'spose I should post the photos... maybe when I get the oil off the rocks I will get the camera out.
|
|
OregonBorn
noticing nice landscape pebbles
Member since September 2015
Posts: 88
|
Post by OregonBorn on Jul 16, 2018 16:06:49 GMT -5
So, I snapped some photos of my gold sheen obsidian cuts that I did yesterday. It turned out to have some triple flow clear in the center, and here are the results (wet rock in photos to enhance the effect). Gold sheen can be seen from one vantage point, but not the other. It is not a polarizing effect, as I have a polarizing filter on the camera (taken with a Nikon D80 with a Nikkor 18-200 DX zoom lens).
Gold sheen with the sun behind the camera
Rocks rotated 180 degrees, no gold (or less gold sheen)
Note that the rock on the far left of the gold shot and far right of the non gold shot has no gold sheen. Same exact rock, cut perpendicular to the lava flow layers has no sheen in any orientation.
|
|
|
|
Post by woodman on Jul 20, 2018 14:43:26 GMT -5
Just cut this one, not too bad.  |
|
|
|
Post by MsAli on Jul 20, 2018 15:08:24 GMT -5
Just cut this one, not too bad. Not to shabby at all  |
|
Nov 15, 2024 17:44:51 GMT -5
Nov 15, 2024 17:44:51 GMT -5
