The ring in the image features a striking prehnite  gemstone set in a gold-toned metal band. The stone has a smooth, polished, domed surface (cabochon cut) with natural inclusions and fine dark streaks visible within, giving it a unique and organic appearance. Its vivid green hue suggests it could be a gemstone  prehnite with inclusions.

The setting is simple yet elegant, allowing the gemstone to be the focal point. The band’s design appears adjustable, making it versatile for different finger sizes. The gold finish complements the green stone beautifully, creating a harmonious balance of color and shine.

Overall, this ring exudes an earthy, natural elegance—perfect for someone who appreciates unique, handcrafted jewelry with a touch of sophistication and organic beauty.