This is a pendant with a Zultanite gemstone, which is known for its unique color-changing properties. The stone is cut into a heart shape and set in a silver mount that appears to be marked with "925," indicating sterling silver. Surrounding the Zultanite is a detailed border, adding an intricate frame to the central stone. The pendant is displayed against a natural stone backdrop, which contrasts with the polished and refined look of the jewelry piece. Zultanite can change color depending on the lighting conditions, often showing different hues of green, pink, or yellow, which may not be fully captured in the photograph. The pendant is an elegant piece, likely to be sought after for its distinctiveness and the rare nature of the gemstone.