A prosecutor in France has said the financial loss from an audacious heist at the Louvre museum is estimated at €88 million.
Priceless royal jewels were stolen from the building in Paris on Sunday.
The city's prosecutor Laure Beccuau told broadcaster RTL that the museum's curator had estimated the losses at €88m.
However, he said the thieves would not earn the equivalent if they had "the very bad idea of melting down these jewels".
Police, who have stepped up the hunt for thieves, said that 60 investigators were working on the theory that an organised crime group was behind the raid in which nine pieces of jewellery were taken.
A crown covered in more than 1,300 diamonds was dropped in a Paris street as the robbers fled.
Detectives scoured video camera footage from around the Louvre as well as of main motorways out of Paris for signs of the four robbers who escaped on scooters on Sunday morning.
"There are a lot of videos and this is one of the investigators' lines of work," said Interior minister Laurent Nunez.
The heist - which lasted just seven minutes - reignited a row over the lack of security in French museums, after two other institutions were hit last month.
Criminals broke into Paris's Natural History Museum, making off with gold samples worth €601,650.
Thieves also stole two dishes and a vase from a museum in the central city of Limoges, the losses estimated at €6.5 million.
France's justice minister Gerald Darmanin admitted to security flaws at the Louvre.
"What is certain is that we have failed, since people were able to park a furniture hoist in the middle of Paris, get people up it in several minutes to grab priceless jewels, giving France a terrible image," he told France Inter radio.
Mr Nunez ordered better protection around cultural sites, according to his advisers.
A report by France's Court of Auditors, covering 2019 to 2024, points to a "persistent" delay in security upgrades at the Louvre. Only a fourth of one wing was covered by video surveillance.
The thieves arrived at around 9.30am (8.30am Irish time) on Sunday, 30 minutes after the museum opened.
They parked a truck with an extendable ladder, like those used by movers, below the museum's Apollo Gallery, climbing up and using cutting equipment to get through a window and open the display cases.
The world-famous institution, whose extensive collections include the Mona Lisa, has been closed since the raid.
The masked thieves dropped and damaged the crown of Empress Eugenie, the wife of Napoleon III, as they made their escape.
It is covered in 1,354 diamonds and 56 emeralds, according to the museum's website.
But eight priceless items of jewellery were taken, the culture ministry said.
They include an emerald-and-diamond necklace that Napoleon I gave his wife, Empress Marie-Louise.
A diadem that once belonged to the Empress Eugenie, which is dotted with nearly 2,000 diamonds, is also on the list released by the ministry, as is a necklace that belonged to Marie-Amelie, the last queen of France.
The Louvre's website said that the necklace is adorned with eight sapphires and 631 diamonds.
The haul would be impossible to sell on in its current state, according to president of the auction house Drouot, Alexandre Giquello.
The intervention of museum staff forced the thieves to flee, leaving behind some of the equipment used in the raid, the culture ministry said.
It was the first theft from the Louvre since 1998, when a painting by Camille Corot was stolen and never seen again.
