[meteorite-list] Odd Rock - Is it...??

[MexicoDoug]

Dear list, this is a first time posting, so please be patient with me as I still need to get the hang of recognizing the physical properties of meteorites that don't have fresh baked crusts or bright olivine and chondrules.

http://www.geocities.com/sstelenes/rocks.html

The above link is a page with three photos and a description of an odd "stone" from Mexico.� I don't think it is a meteorite.� (I have found some others I suspect to be, though.)� This particular one was given to me and the giver (finder) insisted it was a meteorite.� I don't think so, but it is certainly odd, does anyone know what it could be, with all these odd gunmetal gray square shapes?

Thanks.
Doug Dawn
Mexico