A woman was pushed to the ground and had her £70,000 engagement ring ripped from her finger during an aggravated burglary.
Three men were involved in the break-in in Cathcart Road in Kensington, which also saw the woman’s partner punched in the face.
Police are now appealing for information and have released a photo of the stolen diamond ring.
The raid happened at around 8pm on November 13, when a suspect knocked on the couple’s door. He was wearing dark motorcycle clothing, with his helmet on, and holding a pizza box.
He told the female victim he had come to deliver the takeaway, but then suddenly pushed her to the floor and was joined by two other suspects.
The woman’s fiancé ran to her aid but was hit in the face. One of the suspects then grabbed the woman’s hand and forcefully took the engagement ring off her finger.
The trio then left, possibly on scooters.
The stolen jewellery is described as a platinum engagement ring with a large princess stone in the centre with two smaller princess stones on either side.
Detective Constable Grant McPherson, from Kensington and Chelsea CID, said: “A young couple have been left shaken by the ordeal and we are keen to hear from anyone who has information about this aggravated burglary or anyone who has come in possession of this distinctive ring
“Any information provided, no matter how small could assist us with our investigation and we will treat all information in the strictest confidence.”
Anyone who can help police can call DC McPherson on 020 8246 0186 or Crimestoppers on 0800 555 111.