The Amsterdam Diamond is a black diamond weighing 33.74 carats (6.748 g), and has 145 facets. It is in a pear shape, and cut from a 55.85 carats (11.170 g) rough. It was sold in 2001 for $US352,000, the highest price paid for a black diamond at auction.

The diamond originated in Africa.

The diamond weighs 33.74 carats, making it one of the largest black diamonds known. The diamond is a deep black, which is relatively rare for diamonds. This black color is due to the presence of numerous inclusions, usually graphite, within the stone.

Black diamonds, also known as "carbonado," are different from traditional diamonds because they are typically more opaque and have a unique polycrystalline structure. There is some debate about how black diamonds form, but it is believed they may originate from space or through high-pressure conditions on Earth.

The Amsterdam Diamond was discovered in Central Africa, though the specific country is not well-documented. Africa is a significant source of black diamonds, and many of these gems are found in regions like the Central African Republic or Brazil.

The diamond is named after the city of Amsterdam, Netherlands, where it was sold at auction in 2001. The auction highlighted its rarity, and it fetched a high price due to its size, color, and unique characteristics.

• List of diamonds

• The Amsterdam Diamond on The World of Famous Diamonds