This ring is made with a Titanium band inlaid with Corvette Fordite.
Fordite is created from the buildup of enamel paint layers on the floors on which cars stand during the painting process, over a long time many colorful layers buildup and are cooked over and over, this creates the strong colorful chunks that are called Fordite/ motor agate / Detroit agate.
Each of these rings contains color from tens or hundreds of Corvette cars.
See how it's made:
This is what raw Corvette Fordite looks like:
More shots from the process:
The Woodsphere website: