This is Berber Agate; I'm told it's from Mexico. This particular piece has features that look like a flaming meteor streaking through space enroute to a cosmic disaster! Since I only have this small sample, I'm adding this cab to my collection.

Dimensions: 55mm x 23mm x 8mm.  Weight: 91.05 carats.

This cabochon is in my personal collection; it is not available for sale.