Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
I've had this little guy for a while now and have been trying to identify it for some time with no luck. It looks like its oxidized with tiny little crystals, but it's hard to tell for sure.
Any help is appreciated!
I believe it is Silicon carbide / Carborundum crystals, a man made abrasive.
A photo from my collection.