No earthly being could’ve crafted that thing with such total disregard for comfort and human anatomy. It’s giving Area 51 Home Goods Collection – Model Zeta Reticuli.
I have slept on it once and I felt shitty whole day after. It think it isn’t calibrated for human neuroelectric frequencies but it boosts my WiFi signal so hey.
Jade is quite a bit harder than even a hardcover book. ;)
It’s not all that posh, though. That example there costs the equivalent of about $35.
Hardness is a lot less important than shape, IMO. Well, I suppose a pillow that’s too soft to hold a shape is very bad, but that still comes back to shape, y’know?