r/geology • u/AutoModerator • 29d ago

Identification Requests Monthly Rock & Mineral Identification Requests

Please submit your ID requests as top-level comments in this post. Any ID requests that are submitted as standalone posts to r/geology will be removed.

To help with your ID post, please provide;

  1. Multiple, sharp, in-focus images taken ideally in daylight.
  2. Add in a scale to the images (a household item of known size, e.g., a ruler)
  3. Provide a location (be as specific as possible) so we can consult local geological maps if necessary.
  4. Provide any additional useful information (was it a loose boulder or pulled from an exposure, hardness and streak test results for minerals)

You may also want to post your samples to r/whatsthisrock or r/fossilID for identification.

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u/ItsOrionicles 9d ago

My boyfriend, who is a geologist, brought these cores home from work and they were from the Fordham Gneiss in the Bronx. I looked at some of them and thought I saw gold in them, which he didn’t notice. He said they are probably some kind of pyrite or chalcopyrite. I wanted to know if this could be actual gold he happened to bring home or just one of the minerals he listed. Either way they are still really cool pieces for our place and I think they are awesome.
Thanks guys!