Guss Posted December 11, 2018 Share Posted December 11, 2018 The attached weighs 8.6 lbs I am not sure what it is and I am hoping for some guidance. I know you are an expert. Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 11, 2018 Share Posted December 11, 2018 Welcome to the Forum. Where was this found? Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
FossilDAWG Posted December 11, 2018 Share Posted December 11, 2018 I'm pretty sure this is a mineral, possibly a form of hematite, and not petrified wood. It is a very attractive specimen. Don 2 Link to comment Share on other sites More sharing options...
Guss Posted December 11, 2018 Author Share Posted December 11, 2018 It was my at Grandparents house years ago. They passed several years back, they were from Michigan but unfortunately none of us know where they got it from. Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 11, 2018 Share Posted December 11, 2018 Mineral was my first impression, also. Maybe @ynot might chime in. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Guss Posted December 11, 2018 Author Share Posted December 11, 2018 A Magnet does not stick to it Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted December 11, 2018 Share Posted December 11, 2018 It is haematite, I'm pretty sure. It often exhibits this woody, fibrous structure and the slightly botryoidal top to it is typical. Haematite, though an iron ore, is not magnetic unless it also contains other iron ores. 2 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
ynot Posted December 11, 2018 Share Posted December 11, 2018 It could be hematite, but I would like to see the results of a couple tests to be sure. Can it scratch a copper penny, knife or glass? (Hardness test.) What is the streak color? (Drag an edge across unglazed porcelain. The underside of the tank lid on a toilet will work.) 1 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...
Guss Posted December 11, 2018 Author Share Posted December 11, 2018 I will try the test and let you know. Thank you all for your input! Link to comment Share on other sites More sharing options...
westcoast Posted December 11, 2018 Share Posted December 11, 2018 3 hours ago, ynot said: It could be hematite, but I would like to see the results of a couple tests to be sure. Can it scratch a copper penny, knife or glass? (Hardness test.) What is the streak color? (Drag an edge across unglazed porcelain. The underside of the tank lid on a toilet will work.) I'm sure we can come up with a better option than the underside of a toilet tank lid . It will work, just make sure you dont drop it.. Link to comment Share on other sites More sharing options...
daves64 Posted December 11, 2018 Share Posted December 11, 2018 18 minutes ago, westcoast said: I'm sure we can come up with a better option than the underside of a toilet tank lid . It will work, just make sure you dont drop it.. Most people probably don't have unglazed porcelain lying around in their homes without pulling it off a wall or floor, but they usually have a toilet. Accomplishing the impossible means only that the boss will add it to your regular duties. Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted December 11, 2018 Share Posted December 11, 2018 5 minutes ago, daves64 said: Most people probably don't have unglazed porcelain lying around in their homes without pulling it off a wall or floor, but they usually have a toilet. Not here they don't! But everyone has spare tiles lying about. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
ynot Posted December 11, 2018 Share Posted December 11, 2018 arrggghhh 1 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...
JohnBrewer Posted December 11, 2018 Share Posted December 11, 2018 32 minutes ago, Tidgy's Dad said: Not here they don't! But everyone has spare tiles lying about. Hahaha. Oh dear. I’m not gonna ask.... 1 John Map of UK fossil sites Link to comment Share on other sites More sharing options...
ynot Posted December 11, 2018 Share Posted December 11, 2018 39 minutes ago, Tidgy's Dad said: everyone has spare tiles lying about. But are they porcelain? 1 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...
Tidgy's Dad Posted December 11, 2018 Share Posted December 11, 2018 Just now, ynot said: But are they porcelain? Porcelain, ceramic, earthenware. Tiles are used extensively for floors and walls and some of them are great for streak tests. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
ynot Posted December 11, 2018 Share Posted December 11, 2018 1 minute ago, Tidgy's Dad said: Porcelain, ceramic, earthenware. Tiles are used extensively for floors and walls and some of them are great for streak tests. Porcelain and earthenware are both ceramic, as are all other clay based products. Glad You have something besides toilet lids for doing streak tests! 1 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...
ynot Posted December 11, 2018 Share Posted December 11, 2018 For those confused by the above exchange... Porcelain is a hard (mohs scale approx. 7) white ceramic and is used for streak tests. Most other ceramics are too soft and their color is wrong to do a proper streak test. 2 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...
Tidgy's Dad Posted December 11, 2018 Share Posted December 11, 2018 Just now, ynot said: Porcelain and earthenware are both ceramic, as are all other clay based products. Glad You have something besides toilet lids for doing streak tests! Okay, I know that ceramic literally means anything heated up made into a design and then hardened, even metals. But here it is also used to mean 'pottery' in any general form. Greek : keramos "clay used by potters". Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
ynot Posted December 11, 2018 Share Posted December 11, 2018 4 minutes ago, Tidgy's Dad said: even metals. I have never heard metals described as "ceramic". From a web search... ce·ram·ic /səˈramik/Submit adjective 1. made of clay and hardened by heat. "a ceramic bowl" noun 1. pots and other articles made from clay hardened by heat. "handmade pottery and imaginative ceramics for the table" synonyms: pottery, pots, china, terra cotta "an exhibit of Armenian ceramics" 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...
Tidgy's Dad Posted December 11, 2018 Share Posted December 11, 2018 57 minutes ago, ynot said: I have never heard metals described as "ceramic". From a web search... ce·ram·ic /səˈramik/Submit adjective 1. made of clay and hardened by heat. "a ceramic bowl" noun 1. pots and other articles made from clay hardened by heat. "handmade pottery and imaginative ceramics for the table" synonyms: pottery, pots, china, terra cotta "an exhibit of Armenian ceramics" https://en.wikipedia.org/wiki/Ceramic Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
ynot Posted December 12, 2018 Share Posted December 12, 2018 Wiki can not make up its mind, there are contradictory statements there.... First- A ceramic is a solid material comprising an inorganic compound of metal, non-metal or metalloid atoms primarily held in ionic and covalent bonds. Common examples are earthenware, porcelain, and brick. And then- A ceramic material is an inorganic, non-metallic, often crystalline oxide, nitride or carbide material. Some elements, such as carbon or silicon, may be considered ceramics. 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...
ynot Posted December 12, 2018 Share Posted December 12, 2018 8 hours ago, Guss said: I will try the test and let you know. Any results? 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...
Ludwigia Posted December 12, 2018 Share Posted December 12, 2018 This looks to me like a cross section of a very large piece of botryoidal hematite, goethite or limonite. Michigan is famous for its iron ore, isn't it? Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Guss Posted December 12, 2018 Author Share Posted December 12, 2018 Streak Test Link to comment Share on other sites More sharing options...
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