Definition: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
Input: Kate Beckett:  Is it possible it 's an heirloom passed down through generations and that 's why there 's no record of it ?
Javier Esposito: Nah , Peters said that old school cutters fashion diamonds with sharp edges . This _ one _ has smooth edges , which means it had to be cut within the last few decades .
Kevin Ryan: And no customs declaration means it was smuggled in , probably from the country where it was mined .
Captain Victoria Gates: Were we able to connect any of Alice 's clients to the diamond ?
Kate Beckett: We 're still going through them , but no , not yet .
Kevin Ryan: Peters said he also found some glue residue on the stone , which suggests it was set in a piece of jewelry .
Richard Castle: For engaged men everywhere . I can only hope it was n't a ring .

diamonds