A blue diamond ring that belonged to the late Shirley Temple Black will hit the auction block next month with a pre-sale estimate of $25 million to $35 million.

The child star received the 9.54-carat fancy deep blue diamond ring as a gift from her father, according to the auction house, sometime around her 12th birthday. That fell a few weeks before the release of her 1940 film "The Blue Bird." Sotheby's is calling the ring the star of its April 19 "Magnificent Jewels" auction.