Blue comet shaped earring

Please help! I've lost a large blue stone stud earring as I walked to St Stephen's Green Park from Kildare Street. it has a mixture of white and blue stones in different sizes and is shaped a little bit like a tadpole. There is one large purple-blue stone at the front end. If anyone has found it please let me know. It has huge sentimental value to me and I am prepared to offer a reward to anyone kind enough to hand it in. Thank you.