Jake7291 Posted September 17, 2019 Share Posted September 17, 2019 I just got a new saw with diamond blade and wanted to test it out. I grabbed one of may saved stoned for cutting and discovered this interior. It may be just standard quartz, but I want to know for sure before I slice it, also I don't think it's not a pudding stone either, I have tons of those. Pictures are of wet stone, if you would like pictures of it dry I will post them. Also going to post one more for ID in this thread if ok Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 17, 2019 Author Share Posted September 17, 2019 Now this one is HEAVY. My diamond blade struggled, took 20 minutes for this slice. Slice is wet except last pic because this is after first slice, I haven't polished it yet or cleaned it. Quote Link to comment Share on other sites More sharing options...
d_day Posted September 18, 2019 Share Posted September 18, 2019 First one’s got me stymied. At first glance looks like a granite of sorts. Might be a quartzite. Can’t really tell. Can’t give a positive ID on the second one, but it looks like basalt to me. Quote Link to comment Share on other sites More sharing options...
Stillweaver hillbelli Posted September 18, 2019 Share Posted September 18, 2019 31 minutes ago, d_day said: second one, but it looks like basalt to me. I'd guess gabbro, basalt's underground cousin (based on the grain size). Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 18, 2019 Author Share Posted September 18, 2019 I looked up basalt for comparison, but none have the black bumpy stuff on the outside and the stone is less angular. I'll take a pic of the bigger portion tomorrow. It's a full stone that is covered with the black bumpy layer. The white one is interesting, I tried to reverse image search it, but of course that never helps. Perhaps once my polishing belts come in Thursday I can polish it for more detail. I noticed that any coloration in it is round, or almost becoming rounded. What could cause that? Is it normal? Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 18, 2019 Author Share Posted September 18, 2019 11 minutes ago, Stillweaver hillbelli said: I'd guess gabbro, basalt's underground cousin (based on the grain size). It doesn't look like it in the light, but this is near solid black, polished gabbro seems to be a blue-grey mixed with black. But I'm the one asking so I can't really say. It almost looks like frost on a black flag pole when wet 1 Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 19, 2019 Author Share Posted September 19, 2019 Full stone of the black one, first four pictures, and dry pictures of the white one. Also I polished the black piece I cut and a slice of the white one. I will post those after the raw stones Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 19, 2019 Author Share Posted September 19, 2019 Polished pieces of black and white stones. Quote Link to comment Share on other sites More sharing options...
fuss Posted September 19, 2019 Share Posted September 19, 2019 Does a magnet react to the black one? also try doing a streak test on it. Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 19, 2019 Author Share Posted September 19, 2019 9 minutes ago, fuss said: Does a magnet react to the black one? also try doing a streak test on it. My compass died if that says anything, put it next to it and it no longer goes north, it may have been a coincidence it is old, but I just used it the other day. I'll streak test tomorrow when my tools come in, will a toilet tank lid work? It's all I got haha Quote Link to comment Share on other sites More sharing options...
Stillweaver hillbelli Posted September 19, 2019 Share Posted September 19, 2019 Underside, yes Quote Link to comment Share on other sites More sharing options...
chrisski Posted September 19, 2019 Share Posted September 19, 2019 I look at the first picture and I can't stop thinking of fruit cake or olive loaf. 1 Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 19, 2019 Author Share Posted September 19, 2019 (edited) Did the streak test, I haven't had much time in streaking so I don't know if this is normal. After a couple passes it leaves a light brown, after a few more passes the color stops. I scrubbed it in an area for about 7 seconds and no color still. Will a unglazed coffee cup work the same? It would be easier to show pictures in light Edited September 19, 2019 by Jake7291 Forgot a word Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 20, 2019 Author Share Posted September 20, 2019 Another update, I'm sorry. The black stone, I looked at the polished piece again after the streak test. I don't know if you can see them in this picture, but under a 5x magnifying glass there are silver like specks scattered throughout it. Please help me identify it before I get my hopes up again haha Quote Link to comment Share on other sites More sharing options...
adam Posted September 20, 2019 Share Posted September 20, 2019 On 9/17/2019 at 8:33 PM, Jake7291 said: I looked up basalt for comparison, but none have the black bumpy stuff on the outside and the stone is less angular. Ok well, What would you like it to be ? Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 20, 2019 Author Share Posted September 20, 2019 4 hours ago, adam said: Ok well, What would you like it to be ? Well seeing that I have some silverish metallic metal after a diamond blade went through it, it probably isn't basalt, I have basalt. Not trying to be rude, but I'm fairly sure basalt leaves a completely different streak than what this stone does. Also this reacts with a compass, that doesn't say much, but it rules out basalt Quote Link to comment Share on other sites More sharing options...
Stillweaver hillbelli Posted September 20, 2019 Share Posted September 20, 2019 Jewelers and some rock/metal detector shops have XRF equipment that can give a fairly extensive ELEMENTAL analysis for minimal cost... either a powdered sample in a plastic bag is acceptable or just place the solid rock sample in the machine focused on the area to be analyzed(about an inch square). In San Diego, Calizuela,last time I had a sample analyzed @ San Diego Detector ,the cost was $10. Quote Link to comment Share on other sites More sharing options...
Stillweaver hillbelli Posted September 20, 2019 Share Posted September 20, 2019 (edited) 5 hours ago, adam said: Ok well, What would you like it to be ? Platinum, palladium,rhodium, silver Or nickel Edited September 20, 2019 by Stillweaver hillbelli Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 20, 2019 Author Share Posted September 20, 2019 (edited) 31 minutes ago, Stillweaver hillbelli said: Jewelers and some rock/metal detector shops have XRF equipment that can give a fairly extensive ELEMENTAL analysis for minimal cost... either a powdered sample in a plastic bag is acceptable or just place the solid rock sample in the machine focused on the area to be analyzed(about an inch square). In San Diego, Calizuela,last time I had a sample analyzed @ San Diego Detector ,the cost was $10. Thanks man, that's my next plan. I will keep everything updated as usual. I guess I forgot to mention, this flexed my blade and had a terrible time going through the material. I probably wasted half the life on it. Edited September 20, 2019 by Jake7291 Didn't realize I didn't mention my blade warping Quote Link to comment Share on other sites More sharing options...
Au Seeker Posted September 20, 2019 Share Posted September 20, 2019 I don't know all that much about rocks, just enough to get it wrong trying to ID them, but maybe it could be specular hematite. 1 Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 21, 2019 Author Share Posted September 21, 2019 1 hour ago, Au Seeker said: I don't know all that much about rocks, just enough to get it wrong trying to ID them, but maybe it could be specular hematite. Nice one, I haven't heard of that one. Those minerals almost look like stars in space when polished, I like it. Got my new blade in, segmented, MUCH better at cutting this. The following pictures are of me cutting a new slab of this and the residue it was creating. This stuff would come out as blue clay like material it was also sticky. I use only water for cooling the blade while cutting. Also I scrubbed the surface of the new cut with a steel wire brush, I didn't know if that would highten or dull the details. I wet a portion of the stone for comparison Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 21, 2019 Author Share Posted September 21, 2019 Oops almost forgot new slab piece, nice clean cut, more detail. I also used small wire brush on surface, not polished. Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 21, 2019 Author Share Posted September 21, 2019 Baffled again by this black piece. I was looking at the new cut portion this morning and was curious to see if it did anything with an LED light behind it. The following pictures are of the most thin portion, it is the only part that did this. Without the LED, it is black, with it there are transparent crystals? Also went ahead and used a strong magnet tied to string and it reacts only to certain areas within the stone, and only in the slightest way. Quote Link to comment Share on other sites More sharing options...
hardtimehermit Posted September 21, 2019 Share Posted September 21, 2019 Pretty cool volcanic rock you got there. Are you a rock hound? What do you like to do with your nice slices? Quote Link to comment Share on other sites More sharing options...
Jake7291 Posted September 21, 2019 Author Share Posted September 21, 2019 13 minutes ago, hardtimehermit said: Pretty cool volcanic rock you got there. Are you a rock hound? What do you like to do with your nice slices? Only when they stick out to me in my fields haha. I want to find out what this is made of first, these green translucent crystals only appear with light behind it, otherwise that same area is black. I just started rock slicing, I used to just carve into them. Any suggestions on what what to do with them? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.