How do I go about finding out what I have in my possession is?

Question

I couldn' t find a category for what I have.

The item I have was found stuck in a drill bit that they drill for oil under the sea with, it is about 1/2 inch in size, jet black and you can't mark it or break it with a hammer, I don't know where to take it to find out what it is.

It is not molten lava.

I have had it for 30 years and always wondered what this small hard object was that could stop an oil rig drill bit.

Answer 1

Sounds to me like Tektite, a very hard mineral that is actually one of the non-metalic forms of meteorite. Jet black & very hard & dense.

Answer 2

if it was found in an oil drill bit it might be a fom of old petrefied oil ,tar, or sluge that in time it hardened and the oil bit piked it up while drilling