Turquoise with Pearl necklace Turquoise is a member of the mineral group called the mineral kingdom. This group includes precious gems such as diamonds, rubies, and sapphires. The color turquoise is created when copper and aluminum combine with oxygen in the Earth's atmosphere. This Pearl necklace is one of the most beautiful necklaces you will ever see. The pearls are so unique and the necklace is incredibly intricate. The necklace is perfect for any special occasion or just to wear every day.