This is a Royston Mine turquoise silver men's ring with longhorn engraving.

Royston turquoise is mined in the Royston mining district in Nevada, a family-owned operation that produces turquoise in various shades of blue and green, sometimes with golden-brown matrix patterns. The stone in the ring is complemented by a southwestern-style sterling silver setting.
The ring, featuring Royston turquoise, is made with a type of turquoise that is considered rare due to its limited production.
Royston Mine Turquoise: Royston is a classic Nevada mine that is still actively worked, but its production is limited.
The Royston Mining District is one of the oldest patented turquoise mines in Nevada and is known for producing a wide range of colors from deep green to light blue, often with a unique brown to golden-brown matrix. While the mine is still in operation, it produces a limited quantity of high-grade turquoise. This limited and controlled output, particularly of high-quality specimens, has increased the price of the material in recent years. Very rare only 1 of 2.