MOTZA, Israel — An Israeli jewelry company is working on what it says will be the world’s most expensive coronavirus mask, a gold, diamond-encrusted face covering with a price tag of $1.5 million.

The 18-karat white gold mask will be decorated with 3,600 white and black diamonds and fitted with top-rated N99 filters at the request of the buyer, said designer Isaac Levy.

Levy, owner of the Yvel company, said the buyer had two other demands: that it be completed by the end of the year, and that it would be the priciest in the world. That last condition, he said, “was the easiest to fulfill.”