Rings, bracelets, necklaces, watches and earrings were taken in the raid
A tenth man has been arrested in connection with a £40m robbery at Graff jewellers in London.
The suspect has been held on suspicion of conspiring to rob the New Bond Street store on 6 August.
The 45-year-old, who was arrested at his north London home on Thursday, remains in police custody.
Eight men have been charged with conspiracy to rob. One of them also faces attempted murder, unlawful imprisonment and firearms charges.
The eight accused will appear at Kingston Crown Court on 23 October when they are expected to enter pleas.
Another man, 50, arrested on 10 August in connection with the robbery has since been bailed while inquiries continue.