Stan Simpson Posted October 25, 2016 Share Posted October 25, 2016 This may very well be just a rock but it came from the same dredge operation as other pieces I have found near Houston Tx. The only reason I have questions on this piece is that it has round or oval shapes on both ends. It is also very white in color compared to other pieces found. Any help would be appreciated, any ideas? Link to comment Share on other sites More sharing options...
DevonianDigger Posted October 25, 2016 Share Posted October 25, 2016 Weathered calcite? (I'm just tossing my idea in the hat, looking forward to what other people have to say.) Jay A. Wollin Lead Fossil Educator - Penn Dixie Fossil Park and Nature Reserve Hamburg, New York, USA Link to comment Share on other sites More sharing options...
tmaier Posted October 25, 2016 Share Posted October 25, 2016 Yeah, I agree with DevonianDigger, it looks like a calcite nodule. Those rounded domes are a common formation of calcite. Link to comment Share on other sites More sharing options...
fifbrindacier Posted October 25, 2016 Share Posted October 25, 2016 That is a close match. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
brus Posted October 25, 2016 Share Posted October 25, 2016 Calcite for shure. Link to comment Share on other sites More sharing options...
abyssunder Posted October 25, 2016 Share Posted October 25, 2016 Botryoidal calcite. https://www.google.com/search?q=botryoidal+calcite&biw=1360&bih=612&source=lnms&tbm=isch&sa=X&sqi=2&ved=0ahUKEwial5OT-PbPAhUrJcAKHR3qC4EQ_AUIBygC#imgrc=_ " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
ynot Posted October 26, 2016 Share Posted October 26, 2016 Just a little disagreement here. I think it is an agate not calcite. The last pictures show a concoidal fracture and appear to have some spherical features beneath the botryoidal area. Check the hardness. 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...
DevonianDigger Posted October 26, 2016 Share Posted October 26, 2016 I also see what could be agate in the 'gooey middle' portion of the last pic. (Again, not a big geology guy.) There's an agate with calcite as well. Don't know if we're getting closer. Jay A. Wollin Lead Fossil Educator - Penn Dixie Fossil Park and Nature Reserve Hamburg, New York, USA Link to comment Share on other sites More sharing options...
Coco Posted October 26, 2016 Share Posted October 26, 2016 Hi, I think more silicate than carbonate. Quartz family for me. Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
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