By Shubham Kumar Some diamonds are valuable because of their size. Others become important because of the story behind them. Messika’s Okavango Blue is both. Discovered in 2018 at Botswana’s Orapa Mine, the rough blue diamond weighed 41.11 carats. After cutting and polishing, it became a 20.46-carat stone classified as Fancy Deep Blue, VVS1. Messika describes it as the largest blue diamond ever discovered in Botswana and the eighth largest blue diamond discovered worldwide. The stone is now the centre of Le Okavango Necklace, created by Valérie Messika for the house’s High Jewelry collection, Terres de Contrastes. The collection takes inspiration from the landscapes of Southern…