Missoma Curly Molten Mini Initial Necklace

Missoma.com

Pendant design matches the 'twisted S' or 'curly molten' style exactly, Silver color matches, Delicate chain type matches, Overall form factor and dimensions are consistent, Category (Jewelry > Necklaces) matches, High priority retailer (Saks Fifth Avenue)

Dainty S-Shaped Cubic Zirconia Stainless Steel Necklace

Etsy

Exact 'S' shape (fluid, slightly twisted), Pendant fully encrusted with sparkling elements (Cubic Zirconia), Delicate snake chain matches frame, Silver-toned color, Dainty style and size

David Yurman Pavé Initial Pendant Necklace in Sterling Silver with Diamond

David Yurman

Silver color, Initial 'S' pendant, Contains sparkling elements (diamonds), Luxury price tier (plausible for frame)