This bowl is about 6.5″ x 1.75″ and is a great example of the red “flame” staining that can occur in Box Elder.
There are several ideas about what causes the flame stain – maybe a fungus, maybe a bug, or maybe just some physical stress that the tree endured.
In any case, it is striking.
The end-grain (around where the center of the tree was) has been filled where it cracked. You might be able to see a line of transparency in the photos. I have had this bowl in my personal collection for several years, and this repair has not showed any sign of being a problem.