r/whatsthisrock

Found snorkeling on black sand beach on Santorini

What is this? I’m curious about not only the kind of rock but also wonder if it’s Native American related, given it looks like there intentional chipping around the edges.

The material scratches glass, glass does not scratch this material
These photos are dry photos
It feels waxy, soft, smooth, or a mix of those descriptive words
Looks like a chocolate milky color in shade, yet amber-ish orange in the sunlight

Lots and lots. somewhat Big and very small ones (also in pic) I broke one In half. Not really good with rocks but seems slightly heavier than it should be? Also it’s hard but if I drop it it spilts.. Any info will help thanks!

Found in central Oregon. Looks like obsidian that may have been worked. Any thoughts?

No crystals

No layers

No holes

Not glass

Cannot scrape sand off rock

Hard

Various colours; dull smooth surface

Edit: Reddit really compresses images a lot, huh? Here's where we found it. Thank you, kind redittor, for your sleuthing too!

Rock identification flowchart

My kiddo gave this to me and has no idea what it is.. any help?

Found in Oregon. about 25lbs 15” tall

Hello, I bought this from a dealer at a flea market who had no idea what it was. The only test I have done is trying to scratch it with a copper penny (specifically a 1946 penny) and it did not scratch. Thank you so much for your help!

I’m curious to know what you guys think this find could be, it has the feel of wadded up chewed gum and is pink! It shines very beautifully and is crystalized inside. Thank you guys!

I found this in a little place in Western North Carolina Pitzka Forest.

John’s Valley formation, southeast Oklahoma. Creek find. I don’t have a picture before I started taking flakes off it. I’ve been hounding for chert for several years now in this area and have never come across something like this. The chert near the cortex is smooth and all the black stuff in the middle looks freeze cracked (or something).