This is a “MT. Rushmore Black Hills Jewelry” cat necklace.

The clasp reads NC 925 The back of the cat reads “RGC 925 12K” This piece is silver with some Black Hills Gold. The necklace, case, and “Lifetime Guarantee” paperwork are all included in this listing. This piece was a gift, but probably cost between $70 and $100 (see a listing online at https://www.riddlesjewelry.com/black-hills-gold-ladies-cat-pendant-in-sterling-silver-mr2455-223278.html )