emorysky Posted August 31, 2015 Share Posted August 31, 2015 Looks like veins Link to comment Share on other sites More sharing options...
Wrangellian Posted August 31, 2015 Share Posted August 31, 2015 Interesting. Never seen the like before. It reminds me of a moss agate (which is not actually a fossil) but the 'blades' are so much larger than the typical 'moss'. Can you wet the stone for better clarity and take another pic in similar light to the first pic? Link to comment Share on other sites More sharing options...
snolly50 Posted August 31, 2015 Share Posted August 31, 2015 Explore "rutilated quartz rough" as a possible match for your piece. That's what it looks like to me, but it is difficult to tell from the photo. Human beings, who are almost unique in having the ability to learn from the experience of others, also are remarkable for their apparent disinclination to do so. - Douglas Adams, Last Chance to See Link to comment Share on other sites More sharing options...
Wrangellian Posted September 1, 2015 Share Posted September 1, 2015 I thought of that, but it looked different enough from the examples I've seen (and have), that I tossed it out. Would be an interesting example if that's what it turns out to be.. Link to comment Share on other sites More sharing options...
ynot Posted September 1, 2015 Share Posted September 1, 2015 I thought of that, but it looked different enough from the examples I've seen (and have), that I tossed it out. Would be an interesting example if that's what it turns out to be.. It could be a close relative of rutilated quartz-- sagenite agate. It does look like a rutilated quartz though. Can You show pictures from different angles and one wet? ( to show the inside better. ) Tony PS Rutilated quartz is one of My favorite stones!!! ( I even have a claim on a deposit in the central Sierra Nevada mountains of California! ) Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Wrangellian Posted September 1, 2015 Share Posted September 1, 2015 It is a pretty cool stone ("How do they get those little needles inside that rock?" ) I guess the rutiles could be bundled in such as way as to give the appearance we're seeing, whereas most of the ones I've seen they are more randomly distributed. I would like more pics, closer up. Link to comment Share on other sites More sharing options...
ynot Posted September 1, 2015 Share Posted September 1, 2015 It is a pretty cool stone ("How do they get those little needles inside that rock?" ) I guess the rutiles could be bundled in such as way as to give the appearance we're seeing, whereas most of the ones I've seen they are more randomly distributed. I would like more pics, closer up. Rutile is a TiO2 crystal that forms in high temperature conditions. It will often "grow" in the seam before the Quartz or agate, which grows around the rutile crystals. It can be a prismatic (blocky) or acicular (needle) type crystal. The "needle" crystals are called Sagenite. Tony PS For some pictures of rutilated quartz see My string in "Rocks and Minerals"-- Rocks from My collection - not fossils. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Wrangellian Posted September 2, 2015 Share Posted September 2, 2015 Rutile is a TiO2 crystal that forms in high temperature conditions. It will often "grow" in the seam before the Quartz or agate, which grows around the rutile crystals. It can be a prismatic (blocky) or acicular (needle) type crystal. The "needle" crystals are called Sagenite. Tony PS For some pictures of rutilated quartz see My string in "Rocks and Minerals"-- Rocks from My collection - not fossils. I knew that much about how they form, but I guess it doesn't hurt you stating it for benefit of general readership... I have one similar to your 2nd pic in 2nd post in that thread, I think it is from Brazil. Most I have seen are like your specimens and mine, with the needles very fine and randomly distributed within the xl. This one however seems to have larger (clumps?), more evenly distributed, and some seem to be curved or is that just my imagination? Are you seeing the same thing and have you ever seen anything reasonably similar elsewhere? Link to comment Share on other sites More sharing options...
ynot Posted September 2, 2015 Share Posted September 2, 2015 Most I have seen are like your specimens and mine, with the needles very fine and randomly distributed within the xl. This one however seems to have larger (clumps?), more evenly distributed, and some seem to be curved or is that just my imagination? Are you seeing the same thing and have you ever seen anything reasonably similar elsewhere? The "needles" can be hair like or much thicker- pencil lead like. Do to the crystal atomic structure it likes to "twin" at 120 or 60 degree angles, often making the crystal look bent. Sagenite also grows in radiating structures, with many crystals spreading out from a central point. I think that the bent look in this piece is from surface distortion. Yes I have seen a lot of rutilated quartz that looks like this piece does. I would still like to see some other angles of the stone in the original post. Tony Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
GeschWhat Posted September 2, 2015 Share Posted September 2, 2015 (edited) Do you know where this was found? In the back lit photo, the left side (top if you click on it) reminds me of palm wood. Edited September 2, 2015 by GeschWhat Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
ynot Posted September 2, 2015 Share Posted September 2, 2015 Do you know where this was found? In the back lit photo, the left side (top if you click on it) reminds me of palm wood. I think that palm wood would have a more organized structure to the grain. The "needles" have a disorganized and random appearance, they even cross each other at () degree angles. Better pictures from more angles would help to make a definitive conclusion!!! Tony Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
emorysky Posted September 2, 2015 Author Share Posted September 2, 2015 Will try to get some better picks Link to comment Share on other sites More sharing options...
Wrangellian Posted September 2, 2015 Share Posted September 2, 2015 I still don't recognize it... Can you try taking pics of it wet, in direct sunlight? Link to comment Share on other sites More sharing options...
GeschWhat Posted September 2, 2015 Share Posted September 2, 2015 Do you know where this was found? I was really excited to see your find. I have a thin polished slab that has similar, but smaller inclusions. I was purchased by its original owner as a coprolite at a rock shop in Nebraska, but nothing else is known about it. Mine differs from yours in that only one small area contains similar grass-like structures. Other areas have woody debris and partially decayed (or digested) plant matter. I have been trying to identify its origin for some time, and yours is the first specimen I have seen that would (if organic in origin) have been subject to a similar fossilization process. Location can go a long way in helping to identify exactly what you have. Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
ynot Posted September 2, 2015 Share Posted September 2, 2015 Do you know where this was found? I was really excited to see your find. I have a thin polished slab that has similar, but smaller inclusions. I was purchased by its original owner as a coprolite at a rock shop in Nebraska, but nothing else is known about it. Mine differs from yours in that only one small area contains similar grass-like structures. Other areas have woody debris and partially decayed (or digested) plant matter. I have been trying to identify its origin for some time, and yours is the first specimen I have seen that would (if organic in origin) have been subject to a similar fossilization process. Location can go a long way in helping to identify exactly what you have. The stone that You are asking about is not the same as the stone in the original posting. There is a similarity between them in appearance, but that is just a coincidence. Your slab looks like a true moss agate. The "moss" can be several different things, but it is not rutile. Will try to get some better picks Does the "milky//frosted" appearance look like surface wear or is that the color of the body of the stone? Tony Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
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