plz help me identify these stones

[fauxpaux]

Black stone is more of a diamond shape, reflects light (but not shiny) and very, very hard.
The four sides seem to be smoother

The other creamy stone has a smoother texture, glossy and very hard. The sides seem to have
been shaped so as to make them sharp.

I found those stones.

Your comments are appreciated.

 

[LoversKites]

I have no idea but my best guess is it's some sort of sedimentary rock.

 

[deskjockey]

Where did you find them?

The second looks like chert to me, not sure on the first. You might be better off posting to a rockhounding or geology group rather than here.

 

[fauxpaux]

Tx

 

[fauxpaux]

Found in Texas

 

[stracci2000]

I agree with deskjockey, looks like chert or flint, and knapped by someone to create sharp edges.
Since you found it, then it's probably a Native American arrowhead. Cool find!

 

[movie zombie]

first one has quartz veins.....see this a lot here California.

if the rock is greenish and feels slippery/soapy it could be serpentine....

as much as I love picking up rocks like this, they are not valuable.

a good geology field guide book will help you lots!