Partridge Events is offering a special discount offer for firms looking to host a corporate event in the iconic Gherkin building in the City of London.
Drinks receptions and dinners at 30 St Mary Axe - as Sir Norman Foster's glass creation is officially known - can include a live band or a tailored DJ set.
The corporate event management firm will lay on champagne for guests participating in receptions at the Gherkin, but with a twist.
Each glass will contain a submerged piece of jewellry which attendants are invited to keep, complete with a black velvet case as a memento of the night.
Two of the stones will be real diamonds worth £700, though guests won't know whether their booty is real until later on in the evening, when an expert will evaluate each item.
The lucky winners will receive a luxury case for their real diamond, plus a certificate to prove its authenticity.
Based in London Fields, Partridge Events specialises in designing and theming bespoke corporate gatherings, including catering, entertainment, lighting, special effects and scenic backdrops.