What is turquoise?

Features:

Turquoise, also known as Turkish jade, is usually found in secondary epithermal deposits. Its chemical molecular formula is cual6 (po4) 4 (oh) 8 5h2o, which has a soft waxy luster and belongs to the triclinic system. Crystal morphology is dense aphanitic aggregate, sometimes shell-shaped and nodular, and single crystal is extremely rare. The texture is very delicate and the toughness is poor. Turquoise has different colors due to different elements, mostly sky blue, light blue, green blue, green and light green. Copper oxide is blue and iron oxide is green, and color is an important factor affecting the quality of turquoise. Turquoise is best matched with sky-blue porcelain pine, especially glazed porcelain. If there are irregular wires, the quality will be poor. The value of white turquoise is lower than blue and green. The iron "black line" in the block is called "iron line turquoise", and it is called "blue turquoise" abroad.

Mental function:

(1). American Indians believe that turquoise is the spirit of the sea and blue sky, which will bring good luck to the expedition. It is considered as a stone of success and luck and a symbol of divine power. Many ethnic minorities in the world regard it as a gift from God.

(2) Turquoise is one of the ancient gems, with a glorious history of thousands of years, and is deeply loved by people at home and abroad. As early as in ancient Egypt, Mexico and Persia, turquoise was regarded as a mysterious thing to ward off evil spirits, as amulets and funerary objects. Two 28-cm-long fish-shaped turquoise ornaments were unearthed at Yangshao Cultural Site in Dahe Village, Zhengzhou, Henan Province (6500-4400 years ago). The oldest and most precious turquoise is the mummy of the Queen of Egypt (Queen Zell) who wore four gold bracelets made of turquoise on her arm more than 5,000 years ago. 1900 When excavated, the ornaments are still dazzling and can be called world treasures. Turquoise is simple and elegant, and has been loved by people in many countries for thousands of years, even reaching the level of superstition. Egyptians carved the goddess of love with turquoise to protect their treasures; Indians believe that wearing turquoise ornaments can ward off evil spirits and get the blessing of the gods; Tibetan compatriots in China believe that turquoise is the embodiment of God, a symbol of power and status, and the most popular sacred ornament. It was used as the crown of the first Tibetan king as an altar offering. Turquoise is recognized as "the birthstone of December" at home and abroad, representing victory and success, and has the reputation of "the stone of success".

Evaluation and purchase of turquoise;

The evaluation and purchase of turquoise are based on color, texture and fragmentation. Its varieties are divided into: blue turquoise, light blue turquoise, blue-green turquoise, green turquoise and foam. It is blue and dark blue opaque or slightly transparent, with glassy surface, uniform color, soft luster and no brown iron wire. Turquoise is divided into transparent turquoise, massive turquoise, blue turquoise, linear turquoise, magnetic turquoise and spotted turquoise according to texture. Transparent turquoise is extremely rare and of high value. Magnetic turquoise is as bright as porcelain with high quality and high price. The international gem circle divides turquoise into four grades: Grade I (Persian), Grade II (American), Grade III (Egyptian) and Grade IV (Afghan). The first class is the best quality turquoise.

Maintenance of turquoise. When wearing turquoise jewelry, it is best to keep a distance from cosmetics, perfume and other items to avoid damaging the gem jewelry. Because turquoise is porous, we should pay attention to avoid using heavy liquid to measure density, because tribromomethane and diiodomethane will discolor turquoise. Turquoise is delicate in color and afraid of pollution. Contact with tea, soapy water, oil stain, rust and alcohol should be avoided to prevent them from infiltrating into pores and discoloring gems. Turquoise is afraid of high temperature, so it can't be baked directly and exposed to direct sunlight to avoid fading, cracking and drying. Turquoise is hard and brittle, so don't bump against other hard objects, and pay attention when wearing it.