The Kat Florence Lumina, recognised as the world's largest flawless Paraiba tourmaline, is heading to auction at Bonhams Hong ...

Recognizing its extraordinary potential, Kogen estimated that a clean 300-carat stone could be achieved, an ambitious yield by any standard. Years later, in 2009, Guinness World Records recognized the ...

the stone was reimagined and reborn as The Kat Florence Lumina; a perfectly proportioned, flawless, 181.61-carat Paraiba. It is now the largest known Paraiba tourmaline of its kind: unheated ...

(IDEX Online) - A 181.61-carat gem described as "the world's largest flawless Paraiba tourmaline" is to be auctioned at ...