That is the matrix I am falling in love with. Phil, who I purchased these from, has some old cabs with this black in them. Even though he is so honest and trustworthy, I had to examine them under high magnification.
Yes, that is part of the matrix.
I now have 4 of his vintage cabs with the black.
Wow, that is so cool! That one also catches my eye every time i look at the photos. I love how some of that matrix fades out, into a more ‘stormy’ way. Some of the others look just like the ocean photographed from above. Such incredible stones <3
I need help understanding how the black “matrix” crosses the natural greenish-brown matrix that is evident in the cab. Matrix is the remnants of host rock within which turquoise forms; so these black markings don’t make sense from that perspective.
I’d appreciate any of you geologist giving a perspective…Thanks😄