Simulant

Due to its low cost and close visual likeness to diamond, cubic zirconia has remained the most gemologically and economically important diamond simulant since 1976.

He could invent a fictional restaurant for you to bite your burger at but any fictional restaurant would be, like Nomenex, a worthless simulant or inconcinne imitation, a placebic generic.

The soil sample, called LZS-1, is the latest in a list of lunar regolith simulants of varying quality that have been developed to help Nasa and other space agencies around the world prepare for missions to the Moon.