What rock is worth $7 billion dollars? Enigma

Rachel Cormack (Robb Report, 1/18/22); Pat Macpherson, CC Liu (eds.), Wisdom Quarterly

"The Enigma" is the largest faceted diamond to ever appear at auction will go under the gavel at Sotheby’s next month. The distinctive black diamond weighs just shy of 556 carats and reportedly hails all the way from outer space. Never before publicly exhibited or offered on the open market, the rarity will be auctioned without reserve in a dedicated sale that will run February 3–9. Sotheby’s expects the singular stone will fetch between $4.1 million and $6.8 million. More