Details.

Wood: Cocobolo. (Dalbergia retusa)
Origin: Mexico.
Finish: Cyanoacrylate; high polish.
Overall height: 91mm.
Other: The “stone” is formed from a silver birch burr
(betula pendula) sourced locally; stained and coated with cyanoacrylate.
The “stone” setting and inset band are hallmarked sterling silver.
This is close to the greatest diameter box which I can
produce due to the limitation of blackwood size available.