What is the biggest diamond?
Cullinan Diamond
CullinanI, or the Great Star of Africa, is a pendeloque-cut brilliant weighing 530.2 carats (106.04g) and has 74 facets.[29] It is set at the top of the Sovereign's Sceptre with Cross which had to be redesigned in 1910 to accommodate it. Cullinan I was surpassed as the world's largest cut diamond of any colour by the 545.67-carat (109.134g) Golden Jubilee Diamond in 1992,[30] but is still the largest clear cut diamond in the world.[31] In terms of clarity, it has a few tiny cleavages and a small patch of graining. The 5.89cm ×4.54cm ×2.77cm (2.32in ×1.79in ×1.09in) diamond is fitted with loops and can be taken out of its setting to be worn as a pendant suspended from CullinanII to make a brooch.[32] Queen Mary, wife of George V, often wore it like this.[33] In 1908, the stone was valued at US$2.5million (equivalent to US$51million in 2018)[34]– two and a half times the rough Cullinan's estimated value.[35]