What is this heavy dark rock ?

[Ursnaveen]

 

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[vpnavy]

Since you posted this in the Meteorites Forum - I will assume you believe this is a Meteorite. So, until a member pipes in - here are a few informative articles talking about meteorites...

University of New Mexico - Institute of Meteoritics Meteorite Curation and Museum​

Meteorites are pieces of asteroids and other bodies like the moon and Mars that travel through space and fall to the earth...

Do You Think You May Have Found a Meteorite?

Portland State University - Meteorite identification
The mission of our laboratory is to conduct meteorite research to help understand our place in the universe...

About Meteorites

Aerolite Meteorites
A meteorite is a piece of iron, stone, or stony-iron composite that has fallen to Earth from outer space...

How to find out if you have a Meteorite?

Meteorite-Identification.Com
The purpose of this site is to help the visitor better understand elementary identification of the most common meteorites...

Suspect Meteorite Tests​

 

[Built23]

Possibly ilmentite or magnetite. I have some ilmenite that feels very heavy for its size.