Here's his description of the piece.
Chechen burl, wenge, maple burl, lapis, turquoise -- 10 inch diameter, 6 tall When I turned this chechen burl I unexpectedly found a lot of voids and holes, so much so they comprised the structural integrity of the bowl. I needed to fill them with something that would help hold the wood together. This "filler" is crushed stone, lapis lazuli and turquoise, which is held in place by epoxy resin.One of the cool things to me was the way the wood cracked in fractal shapes, giving it an almost psychedelic appearance. I've known Brent for over 20 years and he never ceases to amaze me with one clever and unusual idea after another.
Brent's website is filled with wondrous works of art. Go take a look.