Hi Jen! You may want to post questions about specimens in the “what is it?” forum rather than in these groups. That’s available on the online site – not the app, yet! You should be able to get some help there!

Can someone please help me out with my collection? I know one of them might be chert. PS Thank you people for liking my posts.

It is a section though a trilobite, probably Gravicalymene or Calymene. Similar to specimens of Gravicalymene celebra, found in the Silurian Laurel Dolomite of Kentucky, or the Silurian in Grafton, Illinois, and other Silurian Dolomites.

Thank you Danielle. 😊😊😊

The first picture shows some fracturing characteristc of chert or chalcedony (silicic rocks) however, I’m having a hard time viewing the second picture. Could you please upload one with that orientation but taken from the top please (instead of the side)? For reference I’m using UMass’s geo departments fossil and mineral site guide by Gleba. It’s…[Read more]

Thanks. Typically you won’t have that sort of texture on a scute. I think it’s chert embedded in another rock.

I think this is a sample with two minerals neither pertaining to fossils. There is a quartz and diorite quarry in Holliston so these minerals are a result of old volcanic activity. Sorry!

okie dokie thank you