For centuries Turquoise has been a stone of choice for many cultures. It was used by Ancient Egyptians, Mesoamericans, and the ancient Chinese in jewellery and carvings. In my mine it was always most associated with Native American jewellery which I have long admired.
(Pilot Mountain Turquoise, Tyrone Turquoise, Royston Turquoise with two Sonoran Gold Turquoise stones either side)
One of the reasons Turquoise has long been a favourite stone of mine is the sheer variety of it! The range of colours it naturally forms in is wonderful.
Turquoise comes from all over the world, some of my favourite types comes from American mines. Here's a great map showing some of the South-Western mines and the different variations of Turquoise from them.
(Image from Bow and Arrow NYC)
To care for your turquoise jewellery correctly, it should be kept away from high heat, perfumes and chemicals. Don't wear it when swimming either in the pool, rivers or the sea. It is a very porous and soft stone, exposure to too much water can damage the stone. If it needs cleaning, use a gentle soap and warm water with a soft cloth and dry it immediately.
Let me know in the comments if you have a favourite type of Turquoise!