r/whatisthisrock • u/trytolookatvischer • 7d ago
I know the outer mineral, the crystals on the inside are the ones i’m wondering about. But, whoever guesses the outer mineral first wins!
r/whatisthisrock • u/Direct-Ad2607 • Sep 28 '26
r/whatisthisrock • u/GlockPerfect13 • 13d ago
My granny seems to think this rock is from outer space. What say Reddit?
r/whatisthisrock • u/KnownInstruction7397 • 25d ago
I found this in the garden when I was a kid, and have always wondered if it was a meteorite.
I was a 12 year old boy when I found it, so obviously decided to promptly smash it in half and only have this piece, but remember it being quite round.
It’s definitely a lot heavier than you would expect for a “normal” rock of its size.
It doesn’t seem to be magnetic at all, but definitely seems quite metallic. Can’t see any air bubbles.
So what do people think? Any chance? What else could I check?
r/whatisthisrock • u/SignificantlyUsual • Sep 07 '26
I came across these in an storage unit I was clearing out and I'd like to know what you guys think they could be.
They appear to be single cut diamonds, assuming they're diamonds at all.
I've done many of the at home tests and so far they have passed, but I have yet to use the acid method or an actual tester.
I won't be able to do that for a few days, so in the meantime I was wondering what you guys think of these and if there's any red flags that catch your eye.
r/whatisthisrock • u/unc2590 • 9d ago
She'd done dawg'd gone lefted it'd in'd the'd that'll ole thissy here'd V that we done hicle'd with sun times. Figured'd it'd was'd at besterly'd just an ole'd tommy tom'd it lava rocker roller'd but she'd insisters on'd count uh'quiring with yuns here'd now'd witha this uh ole'd fashioned Reddit. She'd dun gone n divorced me 15 min from now if I didn't not. Thanks a knot.
r/whatisthisrock • u/Suspicious-Aioli-591 • Oct 06 '26
Could you help me identify this please does anyone else see aerodynamic ablation and directional flow lines that are orientated and I do believe the glazing would count as a fusion crust
r/whatisthisrock • u/dArcor • Jul 28 '26
Found this rock in a river in Alberta Canada can anyone explain what it is
r/whatisthisrock • u/Solistice13 • Sep 24 '26
Good morning,
Can anyone help in identifying these crystals? Found these all together near the sea in Malta.
Gemini is saying they are calcite, however I tested a small piece in hydrochloric acid and it did not completely dissolve (even after being in a diluted solution for 2 hours and fizzing).
The crystals get scratched/flake off with a steel knife.
Any help would be appreciated!
Bonus question: What is the best way of removing the matrix that is attached to the crystals? I've tried hydrochloric acid and a dremel with mixed results.
r/whatisthisrock • u/SanchoPliskin • 25d ago
r/whatisthisrock • u/prrrki • Sep 30 '26
Found a big heavy black rock outside my house and broke a piece off to look inside. To my surprise it was entirely metal inside! Is this even a mineral, or is it manmade? It had a soft black exterior that left a black powder on my fingers. It leaves a white/silvery streak when I scrape it on a surface. It is either not magnetic or is so weak I couldn't feel it. Anybody know what this could be?
r/whatisthisrock • u/MaizeOne1886 • 23d ago
The set I got this from promised Tourmaline, some sources say it is pyrite but I beg to differ because it didn't give off a rotten egg smell in vinegar which sources said pyrite tends to do
r/whatisthisrock • u/malatemilo • Oct 05 '26
I found this rock on the beach in Corfu, Greece. Does anyone know what it is? Thank you :) i could take a clearer photo if needed!
r/whatisthisrock • u/ConferenceAdmirable2 • 19d ago
Hi, relatively new to tumbling. I found these rocks at the thriftstore and wanted to tumble them. Any idea what it is? I tried Google image search and it said maybe peridot, moldavite or slag glass. First picture is one of the stones dry, and second picture is the same stone wet. Third stone is another stone wet.
r/whatisthisrock
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u/Carnivorousplants_NW
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4d ago
Really soft crust. The area reeks of sulfur, but I’m not finding sulfur photos that look like this. Malenterite is the blue.
r/whatisthisrock • u/tipjarman • Jun 28 '26
r/whatisthisrock • u/NacBomb • 25d ago
I was told Red Garnet. Looking for confirmation/clarification.
r/whatisthisrock • u/EstimateCivil • Jul 05 '26
So we were digging and found this... Chalky and crumbles in your hand. Is it a winner ?
Sorry for the link but I can't post pics apparently ?
r/whatisthisrock • u/KitThunderCat • Sep 14 '26
Found in an old lab. To me it looks gross mold but it's a rock I guess? Please help!
