When selecting Turquoise, prioritize stones with a vibrant, even color, with the most valuable being the pure sky-blue hue found in Sleeping Beauty Turquoise. Some Turquoise may have a matrix (veins of other minerals), which can add character but may affect value. Authenticity is crucial, as many Turquoise stones are treated or even imitated. Look for natural Turquoise, and consider purchasing from reputable sources, especially if seeking Sleeping Beauty Turquoise. Proper care is essential, as Turquoise is relatively soft and porous, so avoid exposure to chemicals and harsh environments.