This item appears to be a vintage Mexican mixed-metal cuff bracelet featuring an etched copper band with a brass lizard or gecko overlay and iridescent abalone shell inlay. 

The market value for this type of vintage Mexican mid-century mixed-metal cuff bracelet generally ranges from $35 to $65.

Similar vintage 1950s–1960s Mexican copper and brass lizard/gecko cuffs with abalone shell inlay have recently sold or listed at the following price points:

• A nearly identical detailed lizard cuff is available for $40 at Viva Vintage Clothing.

• Another close match listed on eBay valued at a 50% discount price of $34.50.

• Similar pre-Columbian and animal-themed Mexican copper/brass cuffs on Ruby Lane and Etsy trend between $42 and $60