Lost 18 K Diamond Ring found and returned in Dolton, Illinois

In Chicago I was contacted to search for a ring that was lost when she was throwing stones at amorous opossums in the back yard. It was a collapsible 18K ring with diamonds. Less than 30 minutes and I found it. I was using my XP Deus  and was surprised to see that it rang up at 78 using 18 kHz. It seems that 18K can come in very high.