Police investigating a break-in to Pandora jewellers in Swan Walk, Horsham, in the early hours of Friday morning (March 22). have now confirmed that the jewellery stolen is valued at £500,000.
The alarm was raised just before 12.30am with a report that six masked men had broken into the rear of the building, put a wide range of jewellery into bags that they had brought with them, and then fled on to Albion Way towards the nearby Y Centre.
Some jewellery had left been scattered around the shop.
Items taken included charms, necklaces, bracelets, rings and earrings.
Police attended within five minutes of the alarm being raised, and searched the area, but no suspects or jewellery were found.
Police Investigator Sean Tucker said; "This was a determined night-time attack on an unoccupied shop by thieves who will want to dispose of the property, so we are asking other retail outlets, and members of the public, to let us know if they are offered quantities of jewellery, perhaps at cut prices.
"Anyone with information about the incident or who may have seen anyone acting suspiciously in the area, perhaps in the days leading up to it, is asked to report online or call 101 quoting serial 17 of 22/03.
"You can also contact the independent charity Crimestoppers on 0800 555 111."
For advice on preventing shop and office burglary see the Sussex Police website here.