Fossil Petrified Palm Root Slab Lapidary Stone Slice Cut Rock Arizona Rainbow Wood and is of course excellent

and is of course excellent for knapping as well

but it is a fossil stromatolite

The age of this is unknown

You will either need to seal those or incorporate them into your work

Fossil Petrified Palm Root Slab Lapidary Stone Slice Cut Rock Arizona Rainbow Wood and is of course excellentThis is a slab of Mystery Petrified Palm Root from an old stock collection. I don't know where this material was mined, but it's beautiful. It's a great specimen or collector's piece. Measurements (inches longest approx): 4. 3 x 4 x . 22 The last photo has been taken dry so that you may see any defects. The other images were taken wet to simulate polish.