Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Feb 21, 2015 23:05:34 GMT -5
Some time ago James sent me some rocks to sphere up for him. He was generous and sent large sized stones. I have gifter others here from the cutoffs and slabs I produced making the cubes. These football size and shaped nodules are greenish (think variscite). For some time we have been thinking "silicated variscite" as there are "known" deposits of just such an animal not 50 miles from James' find. You guys know me, I did my diagnostics (mohs-tly) @shotgunner's diagnostics steel does not scratch pool acid does not react Hackly break but very fine scratch on porcelain tile is very light mint green SG = 2.25 I sent a piece to for Xray Fluorescense analysis along with stoner's mystery metal. Here is the analysis from my guy But::: no aluminum and no phosphorus. NOT Variscite! holy cow! HELP!!! What do we have!?!?!?!? snowmom we need your research skillz here. vegasjames - James please add pics. I having nothing yet. Very busy selling windows.
|
|
|
Post by snowmom on Feb 22, 2015 6:20:57 GMT -5
ooh I love a mystery, yes, we need pictures, so interesting!
Also if possible, more details on where it was found and what other rocks were near that location?
|
|
|
Post by snowmom on Feb 22, 2015 6:52:50 GMT -5
Some time ago James sent me some rocks to sphere up for him. He was generous and sent large sized stones. I have gifter others here from the cutoffs and slabs I produced making the cubes. These football size and shaped nodules are greenish (think variscite). For some time we have been thinking "silicated variscite" as there are "known" deposits of just such an animal not 50 miles from James' find. You guys know me, I did my diagnostics (mohs-tly) @shotgunner's diagnostics steel does not scratch pool acid does not react conchoidal break scratch on porcelain tile is very light mint green SG = untested (so far) test promised at my first convenience. I sent a piece to for Xray Fluorescense analysis along with stonerstoner's mystery metal. Here is the analysis from my guy But::: no aluminum and no phosphorus. NOT Variscite! holy cow! HELP!!! What do we have!?!?!?!? snowmom we need your research skillz here. vegasjames - James please add pics. I having nothing yet. Very busy selling windows. 7-11% aluminum in parts of it though, maybe just an inconsistent piece. the conchoidal fracture is what is mystifying me at the moment, as well as the light green streak can't wait to see pictures so I can see the texture (is it smooth, crystaline, layered, show obvious cleavage???) thinking...
|
|
Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,456
|
Post by Sabre52 on Feb 22, 2015 10:24:56 GMT -5
Not a big mineral guy here but microcline feldspar is a potassium aluminum silicate and can be green in color.....Mel
|
|
|
Post by fantastic5 on Feb 22, 2015 11:03:18 GMT -5
I actually googled 'enigmite' Boy to I feel silly
|
|
Fossilman
Cave Dweller
Member since January 2009
Posts: 20,681
|
Post by Fossilman on Feb 22, 2015 15:46:24 GMT -5
Pictures!!! Thumbs up
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Feb 22, 2015 16:17:06 GMT -5
Is there a potassium form of jade?
|
|
|
Post by vegasjames on Feb 22, 2015 16:28:37 GMT -5
The funny thing is that it has the color range of variscite, also reacts to heat like variscite and have stringers of turquoise is some pieces, which can also be consistent with variscite.
Be interesting to see what the atomic absorption spectrometer reading comes up with. At the lab now so hopefully will have an answer in a week or two.
|
|
|
Post by vegasjames on Feb 22, 2015 16:30:24 GMT -5
I actually googled 'enigmite' Boy to I feel silly Tell you what. If it is a new, previously unheard of stone I will name it "enigmite" so you don't feel so silly.
|
|
|
Post by vegasjames on Feb 22, 2015 16:45:51 GMT -5
|
|
|
Post by vegasjames on Feb 22, 2015 20:18:17 GMT -5
Some time ago James sent me some rocks to sphere up for him. He was generous and sent large sized stones. I have gifter others here from the cutoffs and slabs I produced making the cubes. These football size and shaped nodules are greenish (think variscite). For some time we have been thinking "silicated variscite" as there are "known" deposits of just such an animal not 50 miles from James' find. You guys know me, I did my diagnostics (mohs-tly) @shotgunner's diagnostics steel does not scratch pool acid does not react conchoidal break scratch on porcelain tile is very light mint green SG = untested (so far) test promised at my first convenience. I sent a piece to for Xray Fluorescense analysis along with stonerstoner's mystery metal. Here is the analysis from my guy But::: no aluminum and no phosphorus. NOT Variscite! holy cow! HELP!!! What do we have!?!?!?!? snowmom we need your research skillz here. vegasjames - James please add pics. I having nothing yet. Very busy selling windows. One thing that real makes no sense to me is with such as high potassium content (almost 90%) why isn't the rock more soluble in water or acid? I would also expect a higher potassium content like that to be softer. Can't be a potassium feldspar either. Lacks the crystal structure and the potassium percentage is way to high. Percentage of potassium in potassium feldspar is somewhere around 17%.
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Feb 22, 2015 22:56:01 GMT -5
I'll look into 90% by what. Molecular weight? Fluoresce output, gram weight.... Even just atoms...
|
|
|
Post by snowmom on Feb 23, 2015 6:27:56 GMT -5
www.minerals.net/mineral/sanidine.aspx sanidine has the conchoidal fracture and can be green but not that deep dark green. (actually blue green, isn't it?) I did not see large samples of any in my search but smaller pieces of rough have a look similar to the matrix shown here. (but not the dark green inclusions) The photos all look like what I see shown as variscite... I am really inclining to the idea that it is probably just variable variscite. I am guessing almost any pieces submitted for analysis, on any rock will be variable to some degree. Microcline fills the bill for the deep green parts, overall, looking at the rust stained mother rock in the 3rd photo it does look felsic with almost perfect cleavage...note grain running horizontally and then also vertically. It is not a strong feature, but it is there... so, that's just a few random thoughts, will wait to see what the scientists say on this one...
|
|
|
Post by snowmom on Feb 23, 2015 15:58:54 GMT -5
that 1 percent chlorine, how about it being chlorite, that would account for the deep green areas.. ? but funny it would be in the white area... things that make you go 'hmmmm'
|
|
|
Post by vegasjames on Feb 23, 2015 16:02:42 GMT -5
Some samples of garnierite look a lot like what I have but garnierite is soft and tends to crumble easily.
|
|
|
Post by vegasjames on Feb 23, 2015 16:06:26 GMT -5
that 1 percent chlorine, how about it being chlorite, that would account for the deep green areas.. ? but funny it would be in the white area... things that make you go 'hmmmm' That is the other thing that has me confused about the analysis so far. What is causing the green overall? Potassium, iron nor silica would create green. It will be interesting to see what the atomic adsorption test comes up with. It is a 32 element test. But I did not separate out the different parts of the rock (light green vs dark green) but rather sent one small chunk to be tested.
|
|
gemfeller
Cave Dweller
Member since June 2011
Posts: 3,773
|
Post by gemfeller on Feb 23, 2015 16:27:04 GMT -5
[quote author=" vegasjames"That is the other thing that has me confused about the analysis so far. What is causing the green overall? Potassium, iron nor silica would create green.[/quote] I'm not sure how to interpret that comment. Are you saying that potassium, iron and silica can't cause green? It's your use of the word "nor" that confuses me.
|
|
|
Post by vegasjames on Feb 23, 2015 17:20:51 GMT -5
[quote author=" vegasjames"That is the other thing that has me confused about the analysis so far. What is causing the green overall? Potassium, iron nor silica would create green. I'm not sure how to interpret that comment. Are you saying that potassium, iron and silica can't cause green? It's your use of the word "nor" that confuses me.[/quote] Potassium does not form green in rocks that I am aware of. Iron only forms a yellow or very light green in rocks as far as I know in turquoise. A low copper, high iron turquoise is yellow to light green. Silica is not green either. Impurities in the silica can make it look green. So the point I was making is that I have not seen anything in the analysis so far, such as a copper or chromium impurity that could account for the medium to dark greens in the stone.
|
|
gemfeller
Cave Dweller
Member since June 2011
Posts: 3,773
|
Post by gemfeller on Feb 23, 2015 17:37:24 GMT -5
Thanks for the clarification. As you note, iron can replace copper in turquoise to turn it green. Some of the greens are pretty saturate as in the case of King's Manassa turquoise from Colorado and a few others. Iron's also the chromophore in a type of green beryl often erroneously sold as emerald. It's also the chromophore in peridot, some of which can be a pretty intense green like the best of the Pakistani stones. It also is a green coloring agent in actinolite, a constituent of nephrite. I'm sure there are others but those come immediately to mind.
|
|
Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,456
|
Post by Sabre52 on Feb 23, 2015 18:34:33 GMT -5
Hmm, I was under the impression that iron oxides can cause any shade of red, yellow or green (from light to dark green) Not all green in jade is due to chromium inclusions but some is due to iron. Likewise the dark green of bloodstone or the bright green of green moss agate. I believe those are iron oxide in origin too......Mel
Oops, Gemfeller beat me to it *L*
|
|