Sterling silver (92.5%)?
Unlike every single rock based countertop, it has a chance of greatly increasing in value. Silver is of course naturally antimicrobial and can be kept from tarnishing with a slight electrical current.
I know of one person who did their countertop in sterling silver, he sold it, retired on it and went to a cheap piece of rock later. If you are going to spend $10G's on a counter its not as farfetched as some think.
0.5 gram microsd delivered by 12,000 pound combustion vehicle and driver.