A rare Golconda vivid blue diamond weighing in at over 23-carats is set to be auctioned at Christie’s in May.The gem was once owned by the Maharaja of Indore. The sale is expected to set a record at $35 to $50 million. (AP video: Joseph B. Frederick)

Rare blue diamond once owned by the Maharaja of Indore to be auctioned in May

A rare Golconda vivid blue diamond weighing in at over 23-carats is set to be auctioned at Christie’s in May.The gem was once owned by the Maharaja of Indore. The sale is expected to set a record at $35 to $50 million. (AP video: Joseph B. Frederick)