The last ever Argyle pink diamonds have arrived in London.
With the Argyle mine in Western Australia closing, the last 64 gemstones are said to be extremely rare.
Jewellers from across the world will be competing for them at an expected price of £100m.
The most famous pink diamond in the world belongs to the Queen.
The Williamson Pink was given to Her Majesty for her wedding in 1947 – the cut, 23.6-carat round stone was later set in a brooch.
Four people have been charged after a man was stabbed to death in Maidstone.
The 21-year-old London man died in the town centre following a disturbance in the High Street at 03:00 BST on Sunday.
The four, also from London, have been charged with violent disorder and are due before Medway Magistrates’ Court later.
Kent Police said inquiries remained ongoing and anyone with information about the attack should contact the force.
Those charged are: Yussef Abdi Aweys, 19, of Lightfoot Road, Crouch End; Darien Thompson-Cox, 21, of Raleigh Road, Hornsey; Mohamed Abdurahman, 23, of Newland Road, Hornsey and Nathaniel Small, 22, of Boyton Road, Crouch End.
Iran’s judiciary says it has sentenced a British-Iranian woman and an Iranian man to 10 years in prison after convicting them of spying for Israel.
The woman, who was named as Anousheh Ashouri, was also handed a two-year term for illicitly acquiring money.
She and Ali Johari, an Iranian citizen, were accused of passing information to Israel’s Mossad intelligence agency.
The UK Foreign Office said it had been supporting the family of a British-Iranian dual national held in Iran.
“Our embassy in Tehran continues to request consular access,” it added.
“The treatment of all dual nationals detained in Iran is a priority and we raise their cases at the most senior levels. We urge Iran to let them be reunited with their families.”
The Iranian authorities do not recognise dual nationality for Iranian citizens and do not grant consular access for foreign diplomats to visit them in detention.
Iran’s judiciary also confirmed on Tuesday that an Iranian employed by the British Council had lost her appeal against a 10-year sentence for spying.
Aras Amiri, who had been working for the UK cultural organisation in London, was detained in Iran in March 2018.
Last week, Amiri’s fiance told the BBC that she was being used as a “bargaining chip” by Iran’s government. James Tyson said the UK needed to “get on the phone” to Iran and “say this can’t happen”.
He added that Amiri was being held in the same prison as Nazanin Zaghari-Ratcliffe, a dual British-Iranian woman sentenced to five years in prison for spying in 2016, and that the two women were “close” and “very supportive of each other”.
Relations between the UK and Iran have been strained in recent weeks by a row over the seizure of two oil tankers.
On 4 July, an Iranian tanker was seized off the coast of Gibraltar with the help of the Royal Marines on suspicion of breaching EU sanctions on Syria.
The vessel was released on 15 August, but Iran is still holding a British-flagged tanker it seized in the Gulf on 19 July for breaking “international maritime rules”.