Burglars forced open patio doors at a house in Ilkeston and stole jewellery including an engagement ring and a wedding ring.
The break-in happened at a house in Repton Drive between 10am and 2pm on Monday, July 25.
The burglars stole cash and jewellery, including a 22 carat gold wedding ring and a 22 carat engagement ring with three diamonds. They also took a rose gold T-bar necklace and a matching rose gold T-bar bracelet.
All of the jewellery is of sentimental value to the owner and detectives want to hear from anyone who may have been offered similar items for sale.
Witnesses to the daytime burglary, or anyone who saw suspicious activity in the area, should call Detective Constable Emma Daniels on 101, quoting crime reference 16000208041.
Alternatively, send her a message online by visiting the Contact Us section of the police website www.derbyshire.police.uk/Contact-Us.
You can also call Crimestoppers on 0800 555 111.