Brief introduction of stone cat's eye:
In order to better understand the background information and main value of the stone cat's eye, let's first look at the basic situation of the stone cat's eye and have a simple understanding of it. Stone cat's eye is an extremely rare and precious emerald, which has a strong discoloration effect and a very obvious cat's eye effect. The weight of Alexander's stone cat's eye is 14.39 carats, which is produced in Sri Lanka and belongs to a very precious emerald. It is one of the most precious emeralds in the world.
Stone cat's eye background information:
Next, let's look at the background information of the stone cat's eye. Metamorphic rocks, also known as emeralds, are all kinds of emeralds containing trace amounts of chromium oxide. What changed the stone cat's eye was a collector's treasure. Because it contains a small amount of chromium oxide, the golden emerald is red under the tungsten lamp, which is very beautiful. People will turn stone cat's eyes into rubies in the dark, which is also its treasure. The color of stone cat's eyes is different from different angles.
Price of stone cat's eye:
Finally, let's take a look at the main value of stone cat's eyes. First of all, its economic value is very great. According to experts' estimation, the price of a stone cat's eye is about1500,000 yuan, which can be said to be very expensive. The second is its collection value. Because of the special structure of stone cat's eyes, many people are keen on collecting them. The value of stone cat's eye is getting higher and higher. Another value of stone cat's eye is the value of cultural research.
Alexander stone cat's eye introduction:
Alexander turned into a stone [1]? Emerald, also known as metamorphic rocks, was called "Lion Bear" and "Emerald" in ancient China. Its English name is Alexandrite, and its Russian name is александрит. It is a golden emerald. Under sunlight or sunlight, its color usually appears gray-green, yellow-green to blue-green; But under incandescent lamps, it usually looks brown or purple. Many poets praised turning stones into "emeralds by day and rubies by night". ? But it is very rare to achieve bright colors. On June 24th, 2006,165438+1October 24th, the 203-carat Alexandrite "Pubolin Jewelry Exhibition" arrived in Beijing for the first time, and it is on display today. The Pubolin Treasure Exhibition lasted for 10 days and was held at the same time in Henderson Lufthansa Shopping Mall. Emerald is a rare gem with high collection value, and it is very rare to have more than 5 carats. The two famous metamorphic rocks in the British Museum weigh only 43 carats and 27.5 carats, which are far from the 203-carat giant metamorphic rocks displayed this time, so no one can evaluate this gem at present. According to an insider, this gem belongs to a private collection. It is said that it was discovered in the Urals in 1832. It has a strange color change phenomenon, which is green in the sun during the day and reddish brown in the candlelight at night. Compared with the traditional rubies, emeralds and sapphires, Alexander Bian Shi is a newcomer in the gem field. It was first discovered in the Wulashan area in the Russian Tsar era in 1930s 19, near the center of Svrovsk Gem. A group of workers working in Tokawaja Emerald Mine in Urshan found that some emeralds had strange discoloration, which turned green in the sun during the day and red in the candlelight at night, so they were presented to the czar government. When they were discovered, they were at the age of Crown Prince Alexander (later became czar Alexander II) to express their congratulations. Name this gem after it. It was given to Crown Prince Alexander II of Saudi Arabia on the day he came of age, so it was embedded in the crown and named "Alexandrite".
Morphological characteristics of Alexander variant stone cat's eye
The cause of discoloration of metamorphic rocks can be explained by the absorption spectrum of metamorphic rocks. Some emeralds selectively absorb light, orange, yellow and green light, and basically do not absorb red light and green light. In this way, the gem will appear green when the light intensity of green wavelength is in the sun during the day, and red when the light intensity of red wavelength is in the night. The main factors affecting the price of color-changing stone are its color-changing effect, size, transparency and the number of defects. Generally speaking, the more obvious the discoloration effect, such as emerald green during the day and bright red at night, the higher the price. However, under normal circumstances, there are very few gems with such obvious discoloration effect. Generally, they are dark green during the day and reddish brown at night, which is like dark green tourmaline during the day and garnet red at night. Nowadays, the output of metamorphic rocks is extremely rare, and the main producing areas are Brazil and Sri Lanka.
Metamorphic rocks, like cat's eye, belong to chrysoberyl in mineralogy, but they are two different gems because of their different optical characteristics. Metamorphic rocks belong to orthogonal crystal system, and the crystals are mostly short columns and plates. Can change the color (green, red), transparent, translucent to opaque. The refractive index is 1.745- 1.754, which is strongly dichroic and anisotropic. The hardness is 8.5 and the density is 3.73g/cm3. Excellent toughness. Weak red light can appear under both long-wave and short-wave ultraviolet irradiation. The difference between variable gems (emeralds) and similar gems. At present, there are artificial corundum metamorphic rocks, artificial spinel metamorphic rocks and synthetic metamorphic rocks on the jewelry market for sale as natural metamorphic rocks. The main basis of naked eye identification is polychromatic, inclusion characteristics and particle size. Natural metamorphic rocks are dark green or fluorescent green in the sun, and the particle size is less than 1 cm. It's tricolor. It has gas and liquid inclusions. Artificial corundum metamorphic rocks are only dichromatic. Synthetic spinel is not polychromatic. Artificial corundum metamorphic rocks and artificial spinel metamorphic rocks have gas-liquid inclusions and arc bands. The most reliable identification method is to determine its density. Evaluation and purchase of metamorphic rocks (emeralds). Metamorphic rocks (emeralds) should be evaluated and selected on the basis of perfect discoloration effect. In most cases, the stone changes from crimson to purplish red under the light; It is yellow-green and blue-green in the sun. The best emeralds and rubies are rare. The main producing areas of Alexandrite are Sri Lanka and Brazil, others are Myanmar, Tanzania and Zimbabwe, and the mineral deposits in Russia's Urals Mountain have almost dried up. Emerald with beautiful color change is expensive, and high-quality metamorphic rocks over one carat are even more expensive than high-quality rubies, sapphires and emeralds of the same size. But even if you have enough money, it is extremely difficult to get such a gem, and it is really difficult to find it.
The above is the background information and main value of stone cat's eye and stone cat's eye that Bian Xiao introduced to you today. I hope you have a clear and comprehensive understanding of the stone cat's eye after reading it. Stone cat's eye is a rare treasure with great value. What we are introducing here are only some important values. It still has great development value. If you still don't know anything about the stone cat's eye and related aspects, you can continue to pay attention to the relevant content published by us, and at the same time, you can check the information online to understand.