Possible chert?

[Krissymich86]

My husband is an irrigator in the Midland, TX area. A client of his had this in their backyard and gave it to my husband. It was found on the clients ranch originally near Fort Stockton, TX. We thought it was a bone because, well, just look at it lol. We were able to take it to a gem and mineral show yesterday to have it looked at and the concenous was although very interesting, it was chert. Now all the research I've been doing on chert and I have yet to find anything like this. Reverse fossil maybe? 

[Rockwood]

Sorry but I have to agree with weathered chert. The similarity to bone is only on the weathered surface.

[Krissymich86]

Oh I wasn't arguing the non chert part. Just wanted to see if anyone had anything similar because it is interesting looking. 

[Rockwood]

The sleeve of an old work chert is as close as I could come.