Dark Stone and Metal Pendant with Accent Stones

The item appears to be a pendant or charm, possibly from a necklace or bracelet, enclosed within a clear plastic container. The main body of the item is a dark, possibly black or very dark green, polished stone or glass element, roughly rectangular with a faceted top surface. This dark stone is securely set into a metal frame or mounting that has a warm, yellow-gold tone, suggesting it could be brass, gold-plated, or actual gold. The metal setting includes intricate detailing, possibly forming a decorative bail or a method for attachment, visible as curved and scrolled elements. There are at least two small, round, bright, possibly clear or white stones, likely rhinestones or small diamonds, set into the metalwork at the base of the dark stone. The overall design suggests a decorative, possibly ornamental, piece of jewelry. The condition appears to be good with some minor surface wear on the clear plastic case, but the jewelry piece itself shows no obvious signs of significant damage like chips or cracks on the stone, although the light reflections make a definitive assessment challenging. The craftsmanship appears to be reasonably detailed for a period piece, possibly mid-20th century, given the style of the metalwork. No specific maker's marks or signatures are discernible from the provided images.