It’s hard to believe that a humble stamp could be considered exorbitantly expensive, but at $8.5 million, this 1856 postage stamp is considered the world’s most expensive object by weight.
The world is full of valuable objects, from jewelry to rare artworks, but when it comes to value per gram, nothing even comes close to ‘The British Guiana One-Cent Black on Magenta’, a one-of-a-kind postage stamp that weighs just 40 milligrams but is valued at around $8.5 million. To put that into perspective, the average 0.2-carat diamond (which also weighs 40 milligrams) costs about $700, while the same amount of LSD costs around $5,000. There just isn’t an object that can compare to this ultra-rare stamp in terms of value per weight.
