Women's Sterling Silver Cubic Zirconia Rectangular Prong Set

Walmart - AllinStock

Rectangular pendant shape matches exactly, Central clear stone matches, Border of smaller clear stones matches, Silver tone metal matches, Overall design and proportion are highly consistent, Material (Sterling Silver, Cubic Zirconia) is plausible

Women's Rectangle Gemstone Pendant Box Chain Necklace

Walmart - Le Sophisticate

Silver chain, Rectangular clear central stone, Border of smaller clear stones around the main stone, Similar overall size and proportion

Lumiere Sterling Silver Rectangular CZ Pendant Necklace

jessiebeverly.com

Silver chain, Single rectangular clear pendant