All this from ONE stone: Jewellery from world's largest diamond goes on display at Buckingham Palace. The Cullinan Diamond, weighing 3,106 carats in its rough state, was first discovered in 1905 at a mine near Pretoria in South Africa It was originally thrown away as it was thought it to be too large to be a diamond Once recovered, it was presented to King Edward VII as a gift cuts were used in the Crown Jewels Other cuts were used to make brooches, necklaces earring.
The Star of India is a 563.35 carat (112.67 g) star sapphire, one of the largest such gems in the world. (The It is almost flawless and unusual in that it has stars on both sides of the stone. The greyish blue gem was mined in Sri Lanka. The milky quality of the stone is caused by the traces of the mineral rutile,. The tiny fibers of the mineral, aligned in a three-fold pattern within the gem, reflect incoming light into the star pattern.