This is from S.E. Asia and is also called Makamong. We cut a large burl years ago into 4" to 6" slabs. The burl was old to begin with, and had been lying in a timber brokers yard for who knows how long. But it was long enough for pests to burrow through the sapwood and into a bit of the heartwood. The effects were incredible. It reminds me of an old dolomite cave complex after thousands of years of water erosion. Full of fissures and chasms, it is easy to visualize bats flying in and out or maybe a miniature version of Shelob's lair.
Item Number: W35275