Sensitive topic for me being an Indian and not liking how they are not returning to their rightful owners. anyway
The Crown Jewels are the nation’s most precious treasures, including the sacred Coronation Regalia used at the Coronations of new monarchs. Comprising more than 100 objects and over 23,000 gemstones, the Crown Jewels are priceless. They are part of the Royal Collection, held in trust by the monarch for the nation.
At the heart of the Crown Jewels collection are the Coronation Regalia: the sacred objects used during the coronation ceremony. These unique objects represent the powers and responsibilities of the monarch.
so that sensitive topic was Kohinoor
The Koh-i-Noor diamond is one of the most famous diamonds in the world. Originating from the Golconda mines in central southern India, the diamond has had a turbulent history. A symbol of conquest, the Koh-i-Noor has had many previous owners, including Mughal Emperors, Shahs of Iran, Emirs of Afghanistan, and Sikh Maharajas. The East India Company took the jewel from deposed ten-year-old Maharaja Duleep Singh in 1849, as a condition of the Treaty of Lahore.
The Koh-i-Noor diamond weighs 105.6 carats. It was once much larger but was re-cut in 1852 to improve its brilliance and conform to contemporary European tastes. Opposing legends have maintained that the diamond is both lucky and unlucky. More recent tradition asserts it would bring misfortune if worn by a man. The Koh-i-Noor is now set in the Crown of Queen Elizabeth the Queen Mother, 1937.
other than Kohinoor, the following are the crowing Jewels kept here-
St Edward's Crown: was last used for crowning Charles III in 2023.
The Imperial State Crown:
The Sovereign's Sceptre with Cross: The Sovereign’s Sceptre with Cross has been used at every coronation since Charles II’s in 1661
and folks, yes, they are real!! I asked the same question to the attendants (they are highly useful, ask any question and they know more than the guides)