Lost: Gold and diamond pendant necklace

Lost in Canberra (Civic) on 13 June was a gold and diamond pendant necklace. Most likely lost around London Circuit outdoor carpark or near carousel, but also possibly on Nangari Street or around Nishi Building and adjoining car park. Very high sentimental value. If anyone has found then could you please let me know. Reward offered for its safe return. If you have found something like this we can confirm with a photo.