The first is a pic of a medium sized hollow form made from horse chestnut, with a very distinct separation of the heartwood vs. sapwood.
The second is from the same tree, this time a shallow bowl, about 8" diameter. After rough turning a part of the rim fell off (fault in the timber). I cleaned it up and glued it back on with epoxy, now it's barely visible.
Horse chestnut is quite soft, and the tree that I harvested had severe decay in it, accounting for the large contrast in coloration, however this has also caused large areas with faults, so this may well affect your wood too.
Apologies for the low quality, these were meant for personal documentation rather than publication.