Is it cloisonne? Neat style though.

No fori, it was a term I'd never heard before - dang I wish I could remember! But thanks for trying.

The term that you may be looking for is "Champleve". Instead of building walls to contain the enamel, troughs are gouged out of the base medium, which are then filled with enamel
medium and then fired.

madammim thank you very much. Oddly, that term does not sound familiar to me but the description and images I Googled are right on target so that must be it.

I've now written the term and the definition on a note card and it's safely tucked inside the urn - hopefully to stay there! Thank you again.