Neckless with black pearl and letter L and small daimond on it

Lost and found objets very important. Hi, We took with my wife and our baby bus 83 from Botanical Gardens to Georges Street in Dublin Sathurday 27th May 2018 around 1.30/2.00 pm. My wife lost a neckless with a black pearl and the letter L with a small dimaond on it (photo attached). This neckless is very important to us as it comes from our family since generations and it has a high value for us. Did you find it? If yes, could you phone us ASAP. If you have other lost and found services to recommend, please could you give us the link or their email/phone. Thanks in advance for your help. Aurelien