A tourist claims she lost a $250k diamond bracelet - while washing her hands in an airport loo.

Singaporean Jamilah Binto Jamal, 49, landed at the Suvarnabhumi Airport in Bangkok, Thailand, for a four-day shopping trip last Thursday (02/08) afternoon.

The housewife went through passport control then visited the toilets before cleaning her hands - which she said was the last time she saw her five carat diamond bracelet.

Jamilah noticed the wedding gift from her husband was missing when she had left the airport then immediately returned to try and find it.

Wearing a glittering collection of platinum and diamond jewellery, she told airport police that the last time she saw the bracelet was while she was washing her hands after the two and a half hour flight.

Jamilah said: "I quit my job after I got married into a wealthy family because my husband does not want me to work. I had come for a four day leisure trip. I always travel with a lot of jewellery.''

In the video, Jamilah shows a bracelet similar to the one she lost. It has several large sparkling stones mounted on a platinum band.

She appears to mistake the diamond for a 50 carat stone but it is believed to only be five carats. There appear to be around seven on the chain, putting the value of her missing bracelet at a minimum of 250,000 dollars.

Jamilah added: ''One stone is worth 35,000 dollars, but they have more value as it is a wedding gift from my husband who is working as a business man. This jewellery belongs to my husband's family. They own a lot and have a big collection.''

Police said they were now checking CCTV to investigate the incident and see if they could trace the missing bracelet.

An airport tourist police spokesman: "We have already sent the photos of the lost bracelet across the airport and to local jewellery shops, because if a thief has stolen it, they might already have sold it."