Here is a standard for the grade example of an Xf-40 1893 Indian Cent with Two & One Half Diamonds. From the top of the ribbon the first and third diamonds are full and the second diamond shows half detail. This coin has noticeable hints of luster for the grade: around "AMERICA" and the date on the obverse and around "ONE CENT" and the wreath borders on the reverse. (Stock #01c1893140 Two & One Half Diamonds 930612XX)