oh, this is neat! you can get little 10mm cubes of various metals: https://www.amazon.com/Vanadium-Metal-10mm-Density-99-95/dp/B071J61M2C
it'd be kind of neat to get a tungsten one actually. tungsten is remarkably dense, significantly more so than lead, slightly more even than gold. It's probably the densest metal we could reasonably expect to own a decent-sized sample of; rhenium, platinum, osmium, and iridium are all precious metals, and americium and uranium are radioactive.
okay they're claiming it literally makes you psychic what
this is... quite a thing
also the formatting of this ebay listing just reminds me of time cube, with varying font size and colors all over the place and somewhat broken english and
I really can't say anything more than just "this is quite a thing"