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Post by fernwood on Apr 28, 2019 15:31:00 GMT -5
Next door neighbor gave me some firewood and also said I could gather up to a 5 gallon pail full of rocks along her driveway. I left the best for her nieces (who love rocks) and moved them next to the driveway. Only took about 3/4 of a pail. This was a much needed rock hunt after the past Winter here. Everything. A nice piece of debris from the Niagara Escarpment. Group shots. A nice Jasper/Agate. A couple of greenies. Magnet sticks to both. Thinking the one on the right is another Hemetite mix. More Niagara Escarpment stuff. Beautiful purple/pink quartzite. A very strange Quartz for this area. Niagara Escarpment stuff. Mostly Granite, but a lot of blue quartz on one side. Partial Quartzite, but has jasper/agate areas. The other greenie. This was the best 10 minutes I have spent in a long time. If anyone wants to chime in with some ID's I would appreciate it, especially for the greenies. None of these are called chert, locally. Thanks for looking.
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Deleted
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Post by Deleted on Apr 28, 2019 17:18:48 GMT -5
Pretty rocks! Hematite shouldn't be magnetic, at least in its natural form, and green is unusual for iron-based rocks. Could be nickel-rich (nickel is magnetic), or chromium-rich to get the green color. erhaps they might also be a combination of something green like epidote, serpentine or chert and magnetite? Interesting.
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Post by fernwood on Apr 28, 2019 17:30:29 GMT -5
Yes, I thought the green ones were unusual. I will do a scratch test tomorrow, but they appear somewhat hard.
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Post by fernwood on Apr 29, 2019 8:30:00 GMT -5
More photos of greenies. Scratch test on most was about a 7 Mohs. The one furthest right in the group photos came in about 5.5 - 6. This is the most highly magnetic. The end appears to be iron. Most magnetic here. The outer surfaces are slightly magnetic. The green color has thrown me. The one at bottom of these photos appears to have some Malachite. Rare for this area, but I have found several in the past, which were positively ID'd by a local geologist. Any thoughts, anyone? Please excuse my farmer, bar tender fingernails. Had no idea they were that dirty. Thanks.
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Post by rockjunquie on Apr 29, 2019 9:22:39 GMT -5
That's quite the smorgasbord! You really get a lot of them up there! The greens are definitely unique. eta- I meant to add- your hails look honest. Don't you hate it when your nails are funky when you post, though? LOL! I don't mind them, at all.
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Post by hummingbirdstones on Apr 29, 2019 9:29:17 GMT -5
You managed to pick up a nice variety in a few minutes! Wish I could help with the id process. The green ones look really interesting.
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Post by fernwood on Apr 29, 2019 10:14:27 GMT -5
That's quite the smorgasbord! You really get a lot of them up there! The greens are definitely unique. eta- I meant to add- your hails look honest. Don't you hate it when your nails are funky when you post, though? LOL! I don't mind them, at all. You would not believe what I have to do to my nails before going to work. About a 30 minute process. I love this area with lots of glacial deposits. Never know what I am going to find. Cannot wait for Summer when I can see what the Winter/Spring brought to me.
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Post by Deleted on Apr 29, 2019 12:03:04 GMT -5
There is a "gray-green, cherty carbonate-silicate-magnetite iron-formation" mentioned on this mindat page. Perhaps you have something from there or similar? Mentions of silicates containing mixes of limonite, chlorite and/or magnetite from WI in old reports, too, but lack of images makes comparison problematic.
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Post by fernwood on Apr 29, 2019 13:18:28 GMT -5
There is a "gray-green, cherty carbonate-silicate-magnetite iron-formation" mentioned on this mindat page. Perhaps you have something from there or similar? Mentions of silicates containing mixes of limonite, chlorite and/or magnetite from WI in old reports, too, but lack of images makes comparison problematic. Thanks for the clue. Will check on that lead.
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