“This minimalist ring features an estimated total of around 0.25 carats of round brilliant diamonds – each perfectly chosen to match in colour and clarity grades to ensure a continuation of white, bright sparkle.

“The thin ring is set in pavé style, where tiny ball claws keep each diamond in place.”

According to Mr Cherry, Kate’s eternity ring is a “subtle addition” to an already gorgeous collection of rings.

He added: “The width of the eternity band matches that of both Kate’s famous sapphire engagement ring and Welsh gold wedding ring, and is a subtle addition of sparkle to her bridal set.