The egg had stayed in the Rothschild family for more than 100 years.
More recent businesses include Field Fresh, a partnership with the Rothschild family to export fruits and vegetables from India.
The egg, an engagement present for Germaine Halphen, who became the wife of Baron Edouard de Rothschild, was originally bought by Edouard Ephrussi, the representative of the Rothschild family's oil interests in Baku, in modern-day Azerbaijan.
Agora is currently owned by RIT Capital Partners and Lord Rothschild's family interests, along with management.
The allegations and the subsequent probe have dented relations between Mr Rothschild and the Bakrie family.
The other problems have much to do with the fraught relationship between Mr Rothschild and the Bakrie family, also big shareholders of Bumi PLC.
Shareholders in Bumi plc, the UK-listed entity, are holding an extraordinary general meeting on Feb. 21 amid intense wrangling between financier Nat Rothschild and the Bakrie family.
FORBES: Indonesia's Bakrie Clan Prefers Coal Mines To Television Stations
If completed, the deal will mark the end of a high-profile association that has been marred by growing differences between the Bakrie family and Nathaniel Rothschild, the co-founder of Bumi.
But the partnership, and relations with the Bakrie family, soured after Mr Rothschild called for a radical clean-up at the firm.
Mr Rothschild set up Bumi with the influential Bakrie family, part of Indonesia's political and business elite, in 2011.
He balked, as did the married Elie de Rothschild, scion of the French banking and wine family.
Bumi's management instead wants to push through a split agreed with Indonesia's Bakrie family following claims of fraud originally levelled by Mr Rothschild.
Allegations of financial irregularities at its key Indonesian operating subsidiary, PT Bumi Resources - in which it owns 29% alongside the Bakrie family - first emerged in September, after Mr Rothschild received information from a whistleblower.
Allegations of financial irregularities at Bumi's key Indonesian operating subsidiary, PT Bumi Resources - in which it owns 29% alongside the Bakrie family - first emerged that month, after Mr Rothschild received information from a whistleblower.
Relations between the two turned sour late last year after Mr Rothschild called for a radical clean-up at PT Bumi Resources, one of the firms owned by the Bakrie family, in which Bumi holds a 29% stake.
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