Pesky 0 Posted June 22, 2012 Share Posted June 22, 2012 Hello I found this rock gold minig in a local River here in southeast michigan it was about Two foot down in some hardpack gravil . It most likely came down from canada Thank you Ryan. Quote Link to post Share on other sites
Pesky 0 Posted June 22, 2012 Author Share Posted June 22, 2012 Theres a short video of this rock thanks Ryan Quote Link to post Share on other sites
rockhunter1620 62 Posted June 22, 2012 Share Posted June 22, 2012 Well, without doin some basic tests i.e: streak, hardness, specific gravity, etc. it looks like it could be nephrite ( a form of jade), or flint, or chert, but it could be a # of diff. minerals. We are the lands of glacial deposits.100's of different types of minerals can be found in our soils here in Michigan, all from different epochs in deep geological times-scales. Goldfinger, what do you think? Quote Link to post Share on other sites
homefire 2,581 Posted June 22, 2012 Share Posted June 22, 2012 No Expert here but I too would say it's river tumbled Chert or Flint of some kind.Jade is quite Soft. Quote Link to post Share on other sites
Haderly 99 Posted June 22, 2012 Share Posted June 22, 2012 Jade is not that soft…6-6.5. Flint is around a 7 but so are some jaspers which is a possibility. Quote Link to post Share on other sites
oredigger62 17 Posted June 23, 2012 Share Posted June 23, 2012 Chert ... Spending the last 30 years along the shores of lake erie I found a lot of similar samples. I sold them to a guy who made cheapo rings for the flea markets. You could stroll along the rocky river and always pick up a few pieces. But still glad i moved to Arizona , it's a whole new game. Quote Link to post Share on other sites
rockhunter1620 62 Posted June 23, 2012 Share Posted June 23, 2012 Heeey, I said chert first and , and nephrite, of the 2 types of jade, jadeite bein the other, the nephrite is commonly a little more dense, has a higher specific gravity, and tends to be a wee-bit harder, but I said chert first! Quote Link to post Share on other sites
oredigger62 17 Posted June 23, 2012 Share Posted June 23, 2012 Yes you did !!! Good Job to you. :wubu: Quote Link to post Share on other sites
Goldfinger 43 Posted June 23, 2012 Share Posted June 23, 2012 Without being able to hold it in my hand, I don't have a clue. Not much help with indentifying rocks anyway. I think minerals have more characteristics which makes them easier to identify. (my opinion) Rocks are boring.- Sorry Frank. Steve Quote Link to post Share on other sites
rockhunter1620 62 Posted June 24, 2012 Share Posted June 24, 2012 Without being able to hold it in my hand, I don't have a clue. Not much help with indentifying rocks anyway. I think minerals have more characteristics which makes them easier to identify. (my opinion) Rocks are boring.- Sorry Frank. SteveBut Steve, Rocks ARE minerals, it's just that their separate crystal structures are mircoscopicly granular, and to be able to veiw them, they must be magnified any where from 20X- 300X. But my friend, I must be insistant in arguing that you are wrong, and that rocks are definitely NOT boring! ...Frank Quote Link to post Share on other sites
Goldfinger 43 Posted June 24, 2012 Share Posted June 24, 2012 But Frank, rocks are so dull to look at... I'd rather have a nice crystallized specimen of iridescent marcasite on pyrite with calcite and dolomite then a piece of boring granite. But all rocks and minerals are viewed in the eyes of the beholder if that makes any sense. It's just that I was brought up to collect minerals so that's always been my preference. Steve Quote Link to post Share on other sites
oredigger62 17 Posted June 24, 2012 Share Posted June 24, 2012 Good Morning Steve , I understand what you are saying , as well as what Frank has said. All the sparkly minerals will always be prettier than the dull rounded " stones" but they are all prehistoric and made of some mineral or another. I like all rocks , except the ones in my head.... haven't seen them yet. Everybody have a great day... off to the mountains i go. Quote Link to post Share on other sites
Johnno 64 Posted July 8, 2012 Share Posted July 8, 2012 Well I have to agree with the rest. What they have stated is correct. As for stones and a collector, I shudder at kidney stones ;) Quote Link to post Share on other sites
Red_desert 141 Posted July 8, 2012 Share Posted July 8, 2012 Hey, I live near the Indiana/Michigan border. Once I sent a sample to an assayer of Ridgecrest, CA. The assay came back saying it was a type of Glaucophane which is common in Japan, found in some western coastal ranges, is commonly in association with Jadeite. It can be brittle, but can be hard also, bluish-green lighter or darker shades, lavender tinge, can be blackish like Apache Tears.You can find tons of it in glacial till. Sometimes there can be white inclusions or ribbons, making it look identical to some AZ Malachite specimens. Quote Link to post Share on other sites
Red_desert 141 Posted July 8, 2012 Share Posted July 8, 2012 Rule out the possibility of Jasper first, Michigan is known for bright glossy red stones, but can be black too. Quote Link to post Share on other sites
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