LONDON (AP) — A woman who secretly swapped seven pebbles for 4.2 million pounds ($5.7 million) worth of diamonds has been sent to prison for her role in the audacious heist at a luxury jewelry store in London’s tony Mayfair district.

Lakatos had used a distraction to swap the bag containing the diamonds for an identical one containing the pebbles before it was locked in the vault, according to security camera video released by police.

After leaving the store, Lakatos handed the bag containing the diamonds to one of her female accomplices, before ditching the long coat, hat and scarf she wore as a disguise and boarding a high-speed Eurostar train to France.

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