Help Identify Please

[ScottWS]

Hi everyone. My name is Scott and I'm new to this forum. I am a high school science teacher in Arizona and I'm fascinated by Native American artifacts and their history in the area. We recently built a new house and found this basalt rock in our yard. It has been remarkably polished, has obvious hammering marks, and 3 flattened sides. It measures 4" x 3 1/2" and is 2 1/2" wide. The more pointed end appears to have been used as a hammer. Any help in identifying it would be greatly appreciated. I'm going to try to post some pictures. Thanks!

 

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[vpnavy]

1st - I noticed this was your very first post - so, Welcome Aboard ScottWS! Take a look at Forum:Arizona for information (i.e., clubs, etc.) directly related to your state.

2nd - I moved ya from NEW MEMBER INTRODUCTIONS over to ROCKS/GEMS for more exposure.

 

[Bigdob]

I think you nailed it “basalt Rock”
BT

 

[TerryC]

May I suggest looking at the other rocks/pebbles in the yard. If you have many that are rounded, I would say "waterworn". I found a rock that looked like a tool only to learn from a geologist that it was natural. TTC

 

[IAMZIM]

I have many, many basalt rocks polished to a shiney finish from glacial action here in Montana. They are very, very common here.