Metorite looking rock from Idaho desert I believe, feels like it has a slight magnetic pull, but the magnet I have (which isnt very strong) doesnt stick, extremely heavy for its size. can you help me identify.enter image description here
Based on your rock's physical appearance:
- Most likely not a meteorite. Meteorites are typically very firm rock and dense.
- Rock appears to somewhat friable (ability to break or run off particles using your hands).
- It is volcanic or igneous in nature.
- Some volcanic rocks can be slightly magnetic, basaltic rock with high iron content.
- Brown color indicates the rock probably contains significant amount of iron oxide or iron sulfide.
- May show visual indication of hydro-thermal alteration caused by nearby igneous intrusive or volcanic flow.
- Idaho has a variety of igneous and volcanic rocks exposed at the surface over much of the state.
My best guess: Altered igneous rock. Might have pyrite and/or geothite in it.
A more precise identification would require:
- Exact location in Idaho.
- An estimate of its density. Is the rock lighter or heavier than a sandstone, limestone, or basalt of similar size.
- Does the rock have a odor of sulfur or iron? Try getting the rock wet.
- If you know someone with a diamond rock saw, cut an 1/2 off the bottom.
- Take the rock to a university geology department (U of Idaho, Boise State, Idaho State) or to rock and mineral club and have someone take a look at it.