The magnificent
The two largest stones were named the Cullinan I and the Cullinan II.
The largest, called Cullinan I or the “Great Star of Africa,” was mounted to the Sovereign's Scepter with Cross and was first used at the coronation of Charles's great-grandfather, King George V, in 1911. At 530.2 carats, it remains the largest cut diamond in the world.
The largest cut diamond in the world, the 530.2 carat, pear-shaped Cullinan I (or Star of Africa) is set as the main stone in the majestic Sceptre with the Cross. The 317.4 carat cushion cut Cullinan II – the second Star of Africa –was placed in prime position, front and centre of the glorious Imperial State Crown.
Even if the value of the Kohinoor diamond is not known, it is part of the Crown Jewels, and the whole value of the Crown Jewels is between $10 and $12 billion. The Kohinoor is definitely one of the more expensive diamonds in the collection.
The Golden Jubilee diamond
In 1997, the diamond was presented to the King of Thailand after it took specialists a few years to cut and polish. Today, the largest finished diamond is owned by the Royal Family of Thailand.
The most valuable royal piece is known as the Nizam of Hyderabad necklace. It was a wedding gift to the queen (then Princess Elizabeth) from the Nizam of Hyderabad in 1947, according to Regal Fille.
Though it is known as the Black Prince's Ruby, it is, in fact, a 170 carat red spinel. Sometimes called the Great Imposter, it is said to have been stolen in 1371 from the body of the Sultan of Grenada by Pedro the Cruel.
The Crown of Princess Blanche, also called the Palatine Crown or Bohemian Crown, is the oldest surviving royal crown known to have been in England, and probably dates to 1370–80.
The Honours of Scotland, on display in the Crown Room, are the oldest Crown jewels in Britain.
The rarest and most sacred of all the royal crowns will take centre stage during King Charles's Coronation. Following royal tradition dating back to the 17th Century, Charles will wear the St Edward's Crown at the moment of crowning - the only time it is ever used.
On Saturday, when the eyes of the world are on Camilla and Charles, Camilla's crown will instead feature the Cullinan III, IV and V diamonds. The diamonds' inclusion is a tribute to the late queen, who counted the diamonds as part of her personal jewelry collection, according to Buckingham Palace.
While the Crown Jewels are considered priceless due to their historic and cultural value, various experts have attempted to unofficially value them, coming up with estimates of between £3 billion and £5 billion.
You'll find the Crown Jewels under armed guard in the Jewel House at the Tower of London. These gems are a unique working collection of royal regalia and are still regularly used by the monarch for important national ceremonies, such as the State Opening of Parliament.
All about Queen Camilla's necklace and Lahore Diamond
While the Kohinoor was left out of the ceremony, the Lahore Diamond, which is worth USD 12 million or Rs 98 crore, was worn by the new Queen as part of the Royal Family tradition.
Princess inherited Queen Elizabeth's jewellery
According to Radar Online, Princess Kate is expected to inherit Queen Elizabeth's jewellery collection, estimated to be worth around $110 million (£90.67 million) and has over 300 personal pieces that belonged to the late Queen and not the Crown.
It is likely that these jewels will be passed down to members of the Windsor family and if the Queen follows tradition, she will leave the majority of them to the next monarch, which in this case is King Charles III. But as the Queen's will is private, there may be some surprises.
What's more, the top four most expensive pieces of royal jewellery in the world are all owned by the British Royal Family. The Nizam of Hyderabad Necklace owned by Kate Middleton comes in at the number one spot, costing £66.3 million.
#1 - The Hope Diamond
Probably the most well-known of all gems, the 45.52-carat Hope Diamond has a past as colourful as the stone itself. The stone's story as we know it begins in 1642, when a French merchant purchased it and then resold it a few years later to King Louis XIV of France.
The largest precious gemstone ever found, yet unfaceted, is the Bahia Emerald weighing approximately 840lbs (381kg) (containing more than 180,000 carats) originated from Bahia, Brazil and is emerald crystals embedded in host rock.
Quick answer: The rarest diamond color is the red diamond. They are so rare that less than 30 true red diamonds are known to exist. They can cost $1 million per carat and most of the red diamonds in existence are less than ½ a carat in size.
Gem-quality rubies are significantly rarer than diamonds, though there are certain types of diamonds that are very rare too. If we weigh the most spectacular examples of rubies and diamonds against one another, diamonds that show color are even rarer.
The biggest piece is known as Cullinan I and weighs 530.20 carats, making it the largest clear cut diamond in the world. The Cullinan I is mounted on the spectre of Queen Elizabeth II.