There are many superstitions associated with the turquoise. In the Third century, it was believed to protect its owner from falling off a horse. A change in color revealed the infidelity of a wife. Twelfth century Arabian writings said "The turquoise shines when the air is pure and becomes pale when it is dim." They also believed that its color changed with the weather. Persians said that the reflection of the new moon on a turquoise stone brought good luck, and guarded against evil. It was said to have a healing effect on the eye-merely looking at it strengthened the eye, while placing it on an inflammed  eye brought a cure. A 15th century philosopher attributed its change of color to its ability to attract poisons. It was a barometer of its user's health, turning pale in illness and losing color in death, yet regaining its original beauty in the hands of a new and healthy owner.
Turquoise became a major trade and barter item for the early persian. persian turquoise was found in ancient graves in Turkistan, and in the first to third century AD, in graves throughout the Caucausus.
The finest color, sometimes referred to as Persian, is an even robin's egg blue. The ancients preferred blue because a gem-grade blue stone would not change color (King Tut's treasures include a substantial amount of this type of blue turquoise and it appears unchanged today. 

The less hard blues would eventually shade towards green. At this point in history green was not as good. Time has proven this wrong.

"spiderweb," which many people prefer. Rather than clear blue stones without matrix
Although not specifically mentioned in the Bible, scholars believe that the robe worn by the high priest Aaron was adorned with turquoise. Aristotle, Pliny and others refer to stones that must have been turquoise. After the fourth or fifth century AD, many writings appeared discussing the stone. Explorers such as Marco Polo took time to write about it.

Turquoise jewelry, has always been popular in the Orient. Turquoise was a highly revered item to the Tibetans who ranked them in six grades.
The history of turquoise in China dates to the thirteenth century AD Although mining did exist, most stone came from trade with the Persians, Turks, Tibetans, and the Mongols. Much Chinese turquoise was used for carving and in other art and decorative ways. It never became a precious stone for the Chinese as was Jade for example. Turquoise was unknown until the 18th Century in Japan.

"Even colour of this stone uses in fashion and stylish."

Turquoise was not of great import in early and medieval Europe. However, as Asian conquests and incursions into Europe, occurred. Seventeenth century Englishmen traveling there. Brought the style back with them, but not until Victorian time was it fashionable for European women to wear the stone. Victorian and Art Nouveau jewelry featured a good deal of turquoise.

Ancient doctors exploited the stone's medicinal potentials. These varied from land to land and age to age.

 It was thought to prevent injury through accident, prevent blindness by placing perfect stones over the eyes. It was ground into a salve or powder. It was rubbed on or ingested to cure stomach disorders, internal bleeding, ailments of the hip. Even for bites and stings. From snakes and scorpions.
It found its way into the mystic arts. Its color could forecast good or bad, predict the weather and influence dreams. It was good for nearly every ailment including insanity. As a good luck talisman it found usage in nearly every culture. The Egyptians also mounted turquoise in silver to treat eyes suffering from cataract. Since the fourteenth century, harnesses of dogs, horses and other animals have been decorated with turquoise to protect the animal and master from falling injuries.

Turquoise has been believed to confer foresight as well as protect the wearer from danger. In various countries, it is believed to fade when illness or danger is near. Another belief is that a fading stone indicates a lover's faithlessness or a friend's disaffection. In many cultures, the stone is regarded as a harbinger of good fortune, success and health.
Aztecs and Egyptians considered it a symbol of prosperity. In India, one was to wear a turquoise on the little finger and look at the stone after seeing the new moon to gain great wealth. The turquoise from Iran is characteristically an intense medium blue color and takes a fine polish. American and Mexican turquoises range from light blue to greenish-blue to bluish-green. Egyptian turquoise contains more green, showing greenish-blue to yellowish-green.

Turquoise was likely found and used by early man. Certainly the prehistoric peoples of the Western hemisphere knew of turquoise. We have found pieces in burial and archeological sites throughout the two continents. It seems clear that turquoise was always considered a stone of life and good fortune and it even had healing properties. The stone was used in religion, art, trade, treaty negotiations as well as for jewelry. It was considered by some tribes to be associated with life itself.