This is a 925 silver charm necklace featuring a heart pendant and miniature enamel baby shoe charms in colorful pastel shades like pink, yellow, and mint green dangling from a central ring.

The estimated market value of this vintage multi-baby shoe charm necklace depends largely on its specific metal composition: 

• Sterling Silver (.925): If the chain, heart holder, and shoe bases are marked "925", a vintage enamel 4-shoe multi-color necklace typically sells for $35 to $75 depending on its total weight and the condition of the enamel.