The 637 ct. Mouawad L’Incomparable Diamond Necklace was recently recognized by the Guinness World Records as the world’s most valuable necklace, with a price estimated at $55 million, reports say. The neckpiece features 229.52 cts. of white diamonds, with the spotlight being the 407.48 ct. Incomparable yellow diamond, a modified shield step-cut and is considered the world’s largest internally flawless diamond, reports add. The stone originated in the Democratic Republic of the Congo over 30 years, discovered from a discarded pile of kimberlite, by a little girl. The neckpiece was showcased at the Doha Jewellery & Watch Exhibition in February.

With this recognition, Mouawad has achieved four Guinness World Records, reports suggest.