The nearly flawless, colorless diamond unearthed from a mine in Angola is the largest to ever come from the southwestern African nation and the 27th-largest diamond ever recorded.

Measuring about 7 centimeters long (about 2.75 inches) and weighing a little more than 404 carats (about 2.8 ounces), the diamond is classified as a Type IIa, a category of clarity that includes less than one percent of the world’s diamonds. Australian-based Lucapa Diamond Company’s Lulo Diamond Project excavated the gem in th…