POLICE are appealing for help to find a 4.3 carat diamond ring — worth $90,000 — which has been lost in Cottlesloe.

The ring — which has the same value as an autographed Beatles album, a pair of sneakers designed by Kanye West or an Hermès handbag — disappeared on Saturday.

The owner, a 50-year-old Cottesloe resident, contacted police when she noticed it was gone.

A police spokesman said officers were trying to determine exactly when the ring went missing on Saturday as the woman was unsure if she was at home or out when the sparkler disappeared.

“She did go out at some stage, we are trying to work out whether she had the ring when she went out,” the spokesman said.

Cottesloe Police posted an image of the ring on social media in an appeal to the public.