From a tree cut in July in Atlanta, turned a couple of weeks ago, and then finish-coated with 3 coats of epoxy. I believe these came from opposite sides of the same log cut down the middle, although they look rather different. Both half-rounds were cored into 3 bowls; these are the outer (larger) cores in each case.

The wood cuts very smoothly, and wood-database.com says:

Comments: Black Locust is a very hard and strong wood, competing with Hickory (Carya genus) as the strongest and stiffest domestic timber: but with more stability and rot resistance.

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Robert