10k Yellow Gold Onyx Cat Pendant Necklace with Diamond-Accented Collar ( 0.009 cttw, I-J Color, I2-I3 Clarity), 18" This adorable cat pendant with an onyx gemstone belly and real diamond collar has an undeniable air of sophistication The purrr-fect gift for the chic cat-lover Excellent for all ages and any occasion All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free.