Two Hunstanton homes were targeted by thieves last week.
Police are asking witnesses to come forward after the thefts in Homefields Lane between 11am and 3pm on Tuesday, November 25.
Thieves broke into an address through the back door and stole items including 40 pairs of earrings, a gold and diamond ring and a gold, garnet and diamond ring.
A short time later thieves broke into a neighbouring property, possibly through a back door, and stole a cheque book.
Police would like to hear from anyone who may have seen any suspicious activity in the area.
Witnesses are asked to contact Det Con Marie Lloyd at Norfolk Constabulary on 101.