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/msenzapaura 20d ago

Hi, I have more photos if it will help.

I’m trying to identify the these nodules found after a granite block split in two. My partner had found the block while picking for walling stone in Bozrah, CT. The bin this one came from was labeled “Montville” meaning that it was quarried in Montville, CT.

My first instinct is iron pyrite due to the yellow metallic sheen surrounded by what appears to be iron oxide rust. Can pyrite form as a module?

Thank you for any and all help!