Here are some key features you might find in pink heart-shaped luxury earrings:

1. Material Quality: Typically made from high-end materials such as 18K or 14K gold (yellow, white, or rose gold), platinum, or sterling silver. Some designs might also include rhodium plating for enhanced durability and shine.

2. Gemstones: They often feature high-quality gemstones like pink sapphires, pink diamonds, pink tourmalines, or rose quartz. The gemstones may be set in different cuts like heart, round, or cushion to enhance their sparkle and appeal.