To kick off the festive season, Searcys at The Gherkin will host four Diamond Dom Pérignon brunches on each Sunday of December. But these are no average brunches.

In each glass of Dom Pérignon 2009, guests will find a sparkling stone – one of which is a full-cut diamond worth £1,000. When guests have finished their champagne, representatives from the Embee Diamond Reception will carefully inspect each stone to reveal which lucky guest has received the genuine jewel.

Located on the top floor of one of London’s most iconic landmarks and boasting 360-degree panoramic views of the city, Searcys’ Iris Bar will host the stunning four-course brunches.

Starting the morning with a choice of pastries and smorgasbords, guests can then choose from a bavette steak with red wine sauce and fried egg; or a traditional eggs Benedict, Florentine or Royale topped with sustainable, organic Kasperskian caviar from the Swiss Rhone.

Dom Pérignon’s chef de cave Richard Geoffroy insists that the 2009 champagne is a Sunday brunch essential. “It recalls the extreme taste of Cramant Chardonnays and Aÿ Pinot Noirs when they were harvested: such promising richness, exotic notes and incredible aromatic persistence with an energy, a thrill in the mouth and the interplay between effervescence, tannins and salinity,” he told How To Spend It.

Dom Pérignon

Because no brunch would be complete without an indulgent dessert, Iris Bar’s in-house chefs will prepare freshly made waffles with fruit compote, and chocolate ganache tart with malt ice cream and Guinness gel to finish.

The Sunday diamond brunches will be held on 2, 9, 16 and 23 December, with tickets available at £120 per person.