CLEAN : Sotheby's tips largest blue diamond at auction to fetch $48 mn

The video discusses a rare and valuable stone, highlighting its unique features such as its vivid blue color and internally flawless clarity. It is expected to fetch over $48 million at auction. The potential buyers for this diamond are global, thanks to the openness of the market and online bidding.

What are the characteristics that make this diamond unique compared to others?

In what ways has the market for diamond buyers changed according to the speaker?