Rocks from Israel- identification

[Essex]

I found these rocks in the valley of Elah in Israel and wondered if anyone is familiar what type they are. They were laying in a wash by a stream.

 

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[Moesia]

They are either part of a extrusive lava or chalcedony opal mixture. You're pictures don't have enough clarity to tell.

 

[Essex]

Thanks! That's the best camera I have so I guess I'll have to leave it at that.

 

[Eu_citzen]

Agree with Moesia. Though chalcedony seems more likely to me.