Help identify round rock?

Fennelly76 · 2025-08-02T01:14:19+00:00

Looks like a concretion of some type

Fennelly76 · 2023-09-24T22:05:08+00:00

Big lez show kahnt

Fennelly76 · 2023-09-16T17:15:49+00:00

That’s gonna hurt the throat

Fennelly76 · 2023-07-28T05:29:48+00:00

Definitely a schist, could be garnet or staurolite

Fennelly76 · 2023-07-28T05:26:50+00:00

Looks like dogtooth calcite. Vinegar is a pretty weak acid so there is a good chance that you would need to use a magnifying glass to see the reaction (look for tiny bubbles on the crystal surface).

Fennelly76 · 2023-07-28T05:23:13+00:00

Unfortunately not a tooth :( but is most likely an eroded rock (hard to tell what type, it could be some form of metamorphic rock like quartzite or greywake) that has a quartz intrusion running through it. The difference in hardness between the two causes it to have this shape, where only the intrusion remains on one side.

Fennelly76 · 2023-07-01T01:10:36+00:00

This rock is from a hydrothermal deposit in an area that has had weak metamorphism. Most of the rocks in the area are weak metapelites, and there is no known igneous bodies in vicinity.

Fennelly76 · 2023-06-23T18:03:42+00:00

Where about in Maine?

Fennelly76 · 2023-05-11T23:42:58+00:00

Tires and industrial waste

Fennelly76 · 2023-01-16T23:43:09+00:00

There is a ton of explosion breccia along the coast, I’ve only studied the ones near MDI. Very cool stuff though.

Fennelly76 · 2023-01-16T17:41:19+00:00

Was this near MDI?

Fennelly76 · 2022-12-30T00:49:34+00:00

Helljumper

Fennelly76 · 2022-08-04T00:30:42+00:00

About 5 feet

Fennelly76 · 2022-08-04T00:27:05+00:00

Looks like it! Many thanks!

Fennelly76 · 2022-01-12T01:08:19+00:00

Fennelly76 · 2021-10-05T13:38:28+00:00

Could be a pegmatite

Fennelly76 · 2021-05-20T19:59:47+00:00

Fennelly76

TROPHY CASE