This Hollow Form is Walnut, about 7″ around and 4″ tall.
It was turned from a full log, so the pith (center of the log) runs thru the sides of the form. There is a lot of stress around the pith, and it usually leads to cracking.
After it sat for a while, it did crack. I repaired those cracks with Pewa (butterfly) patches and Huini pegs, both made of Maple.
On one side of the form, there is a place where it appears a branch had broken off and the tree grew around it.
Calabash bowl, 11″diameter x 4-1/2″ tall. Walnut. Pewa (butterfly) patches are Wenge.
The bowl was turned from a crotch log, including the pith (center) of the log and branches. I like the figure and grain variation around the pith, but it introduces extra stress in the wood and will certainly lead to cracks.
I let it sit for a while (and crack), then repaired the cracks with the pewa.