Royston turquoise is a highly sought-after, collectible gemstone from the Royston Mining District near Tonopah, Nevada, renowned for its vibrant, multi-colored appearance, often featuring deep blues, rich greens, and a striking brown or golden matrix.Key Features of Royston Turquoise:

• Polychrome Beauty: Rare, as it offers a combination of colors in one stone.

• Uniqueness: No two stones are identical, making them highly collectible.

• Distinguishing Matrix: Known for a golden brown to black host rock that enhances the color.

• "Royston Ribbon": A popular, striped, or layered variety.

• Authenticity: Due to its complex, natural, and variable patterns, it is considered difficult to imitate. 

Royston turquoise is still being produced today, mostly by the Otteson family.