The British Guiana 1c Magenta is the most expensive object in the world by weight. Compared to it, gold and diamonds are cheap because of its immense historical value and absolute rarity!

In the world of investing, we often talk about gold, real estate, or tech stocks. But the most valuable object on the planet, when measured by weight, is a small, battered piece of magenta-colored paper known as the British Guiana 1c Magenta.
In 1856, a colony named British Guiana ran out of stamps because a shipment from London was delayed. To solve the problem, the local postmaster asked a newspaper printer to make some emergency stamps.
At its last auction in 2014, the stamp sold for $9.48 million.
Because it is the only one in existence, it has been owned by famous collectors, eccentric millionaires, and even kings. Every owner marks the back of the stamp with their own small signature or stamp, turning the back of this paper into a map of its journey through time.
The British Guiana 1c Magenta is the "Mona Lisa" of the stamp world. It proves that in economics, extreme scarcity combined with a rich history can make a scrap of wastepaper more valuable than the rarest jewels on Earth.