Coolmore and Westerberg's €1.7-million Arqana August sale topper Diamond Necklace (St Mark's Basilica) backed up a TDN Rising Star performance at the Curragh last month with a first black-type triumph in Saturday's Listed Ballylinch Stud Irish EBF Ingabelle Stakes at Leopardstown.

“I was quite confident when I saw the attitude she had going down to the start and she was really professional,” said winning jockey Christophe Soumillon. “She was a little impatient in the stalls and didn't jump out properly. I had to change plans because she was quite far back. She responded really well when I asked her to quicken at the two-furlong pole and she did it so easy. For her second start, doing what she does is quite amazing. She's quite mature for an inexperienced filly and it will be lovely to see her on Arc Weekend [in the G1 Prix Marcel Boussac].”

Diamond Necklace was last of eight away and settled several lengths off the pace in fifth after the initial strides. Coming under pressure to close when moving into fourth in early straight, the 1-2 favourite quickened smartly to gain an edge with 100 yards remaining and lengthened clear thereafter to easily overpower Sukanya (Havana Grey) by 2 1/4 lengths.