Cullinan I, or the Great Star of Africa, is a pendeloque-cut brilliant weighing 530.2 carats (106.04 g) and has 74 facets.
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 (109.134 g) brown Golden Jubilee Diamond in 1992, but is still the largest clear cut diamond in the world.
In terms of clarity, it has a few tiny cleavages and a small patch of graining.
The 5.89 cm × 4.54 cm × 2.77 cm (2.32 in × 1.79 in × 1.09 in) diamond is fitted with loops and can be taken out of its setting to be worn as a pendant suspended from Cullinan II to make a brooch.
Queen Mary, wife of George V, often wore it like this.
In 1908, the stone was valued at US$2.5 million (equivalent to US$51 million in 2018)– two and a half times the rough Cullinan's estimated value.
Cullinan I, or the Great Star of Africa, is a pendeloque-cut brilliant weighing 530.2 carats (106.04 g) and has 74 facets. 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 (109.134 g) brown Golden Jubilee Diamond in 1992, but is still the largest clear cut diamond in the world. In terms of clarity, it has a few tiny cleavages and a small patch of graining. The 5.89 cm × 4.54 cm × 2.77 cm (2.32 in × 1.79 in × 1.09 in) diamond is fitted with loops and can be taken out of its setting to be worn as a pendant suspended from Cullinan II to make a brooch. Queen Mary, wife of George V, often wore it like this. In 1908, the stone was valued at US$2.5 million (equivalent to US$51 million in 2018)– two and a half times the rough Cullinan's estimated value.
Cullinan Diamond