Newbie looking for a lost diamond earing

[jim2000]

I have done very little metal detecting in the past and a neighbor lost a pair of diamond earrings. I borrowed my dads White spectrum XLT because I figured my cheap Radio Shack detector would not have a chance of finding them. Can anyone give me advice on if this detector will find something this small and if so what type settings I should use. I have it for about 3 days until I want to take it back. My dad got the detector for retirement but has very little experience with it. The backs are not with the earrings. Any help would be greatly appreciated.