Emerald, also known as chrysolite, is one of the five precious stones and belongs to the color-changing variety of chrysolite. Under sunlight or sunlight, its color usually appears gray-green, yellow-green to blue-green; But under incandescent lamps, it usually looks brownish red or purplish red. Commonly known as "emerald by day, ruby by 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 the Tuokawaya Emerald Mine in Urshan found that some emeralds had strange discoloration, turning green in the sun during the day and red in the candlelight at night, so they were presented to the Tsar * * *, because when they were found, they were in the age of Crown Prince Alexander (later became Tsar Alexander II) to congratulate him. Name this gem after it.

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. But in general, there are few gems with such obvious discoloration effect. Generally, it is dark green during the day and reddish brown at night, that is, it is like green tourmaline during the day and pomegranate red at night.

Emerald is a rare gem with high collection value, and it is very rare to have more than 5 carats.

Nowadays, the output of metamorphic rocks is extremely rare. The most important sources are Brazil and Sri Lanka, others are Myanmar, Tanzania and Zimbabwe.

How many kinds of precious stones are there, and which one is the most expensive?

Jade in China can be divided into nephrite and jadeite. Emerald, commonly known as "Emerald" in China, is a rising star in traditional jade in China, and also the top grade in all modern jade. Common jadeite colors are white, gray, pink, light brown, green, emerald green, yellow-green, purple and so on. Most of them are opaque, partly translucent and glassy. According to color and texture, there are more than 20 varieties, such as ruby green, brilliant green, yellow sun green, sunny green, glass green, Ying Ge green, spinach green, shallow water green, light sun green, frog green, melon skin green, plum blossom green, blue-green, gray green, oil green, violet, lotus root powder land and so on. Nephrite is called real jade, such as white jade, sapphire, clear white jade, jasper, jet and so on. All have waxy luster, pure milky white. Judging from the jade articles of past dynasties, nephrite is the main jade used in China, and ancient nephrite is called traditional jade in China. The common colors of nephrite are white, gray, green, dark green, yellow and black. Most nephrite are opaque, and some nephrite are translucent and glassy. The varieties of nephrite are mainly divided according to different colors. The best white jade, as white as suet, is called suet jade. Sapphire is grayish white to bluish white. At present, some people call off-white sapphire sapphire. Jasper is green or dark green, and sometimes black spots can be seen, which is caused by impurities such as chrome spinel minerals. Containing many impurities, when it is black, it is a precious jet. Topaz is also a precious variety. Sapphire has a yellow shell with sugar water, which is called "sugar jade" by the existing people, "pink jade" by some people when the white is slightly pink, and "tiger jade" by some people when the tiger skin is colored. As far as I know, the most valuable thing seems to be Xinjiang Hotan sheep fat jade.

How many kinds of precious stones are there, and which one is the most expensive?

Edit the classification of this gemstone-diamonds, rubies, sapphires, emeralds, aquamarine, cat's eye gemstones, color-changing gemstones, topaz gemstones, opals, tourmalines, pointed gemstones, garnet gemstones, zircon gemstones, olive emeralds, emeralds, quartz cat's eyes, feldspar gemstones, etc. Nbspnbsp nbsp Stones-turquoise, lapis lazuli, hibiscus, wood-changed stone (also known as tiger skin stone), peach stone (also known as golden powder jade), malachite, sapphire, goat liver stone, tiger eye stone, Dongling stone, etc. Among them, turquoise is a famous product in Yunyang County, Hubei Province, China. Nbspnbsp nbsp Crystal-crystal, amethyst, topaz, ink crystal, tea crystal (also known as smoke crystal), soft crystal, bristle crystal and hair crystal. Its minerals are widely distributed and produced all over China. (The above three kinds of gems, stones and crystals belong to inorganic gems.) nbspnbsp nbsp Coral is a benthic coelenterate fossil, red and white, produced in Taiwan Province Province, China, with excellent quality. Nbspnbsp nbsp Beads-pearls (seawater pearls and freshwater pearls) and cultured pearls (seawater pearls and freshwater pearls). Coral and pearls are organic gems, also known as biological gems. ) Gem minerals are the general name of natural minerals with gem value. The main factors that determine the value of gems are bright colors, flawless transparency and brilliant luster, or optical effects such as discoloration, discoloration and starlight cat's eye. The output is scarce; Hard and durable, Mohs hardness above six, high chemical stability. Nbspnbspnbsp gem minerals are mostly natural elements, oxides or oxygen-containing salts, of which silicate minerals account for nearly half. More than 3,000 kinds of minerals have been found in nature, but less than 10% of them have gem value. Among them, precious gem minerals are diamond (diamond), emerald (beryl), ruby (corundum), sapphire (corundum), cat's eye (golden emerald), metamorphic stone (emerald) and jadeite (jadeite). Nbspnbspnbspnbspnbspnbsp diamonds are precious to those who are colorless, transparent and brilliant; Emerald, ruby and sapphire, etc. , which enjoys a high reputation for its gorgeous colors. In the international gem circle, gems other than diamonds are collectively called colored gems. This is not only because of the difference in value and grade, but also because diamonds have stricter and more specific requirements than colored gems in terms of gem quality evaluation and technical indicators (such as color classification and lathe standardization). Nbspnbspnbspnbspnbspnbsp can be used as a mineral material for gemstones, especially high and middle grade gemstones, which are not completely natural products. Many of them are synthetic minerals and imitations, which have the same chemical composition, crystal structure and physical and chemical properties as natural gem minerals. There are about 20 kinds of high and medium grade gem minerals in the international gem market, and their hardness is listed as follows. The gem of nbspnbspnbspnbspnbspnbsp diamond is called diamond. Because of its high hardness (Mohs hardness 10), high refractive index (N=2.4 17) and strong dispersion (O.044), it is bright and hard. It is known as the "King of Gems" and is the most precious gem. Nbspnbspnbspnbspnbspnbsp diamonds are usually available in yellow, brown, blue, green and pink, but colorless ones are more popular. There are 10 extra-large gem-grade diamonds weighing more than 620 carats (124 grams) in the world, the largest of which is Cullinan, weighing 3 106 carats (62 1.35 grams) and measuring 5×6.5×65438. China Changlin diamond, weighing 158.786 carats, was discovered in Linshu county, Shandong province on 1977 and is listed as a world-famous diamond. The main diamond producing areas in the world are Australia, Zaire, Botswana, the former Soviet Union, South Africa, Brazil, Namibia, Ghana, Central Africa, Sierra Leone and China. Nbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbspnbcorundum nbsp a hardness of 9. Gemstones include ruby, sapphire, star ruby and Baoguang sapphire, all of which are precious gems. Nbspnbspnbspnbspnbspnbsp Ruby is bright red because it contains chromium oxide, and pigeon blood red is precious. Sapphire is a general term for corundum gems of all colors except red (including colorless). The color of sapphire is related to the oxide content of iron and titanium, and it is bright blue. & gt

What is the most valuable stone in the world?

1. Dongpo Meat Stone is now in the National Palace Museum in Taipei. About the size of an egg, the mineral chemical composition is silicon dioxide. This Dongpo fleshy stone is a natural stone, and its color and texture are naturally formed. It looks like a lifelike piece of pork belly. This kind of "meat" has obvious fat and fat layer, clear texture and vivid pores. Now it is also called the "Three Treasures of the Town Hall" of the National Palace Museum in Taipei with Yubai and Mao Dinggong. [Specification] 5.73× 6.6× 5.3cm [Weight] 0.52kg

2. "Time" is a strange stone about the size of a * * * head, much like the head of an old western woman. Her nose, mouth, forehead and hair are wrinkled like real people. This strange stone found in a volcanic eruption area 200 million years ago has been transformed into a face by tricolor agate and a facial feature by black agate. Its charity and serenity coincide with the image of modern women. This strange stone named "Time" has been evaluated by experts. It is a natural masterpiece of the international stone altar and a national treasure unparalleled in the world.

3. "The Chicken Broke Out of its Eggshell" seems to have broken, and a fluffy chicken with yellowish color sticks out its head, moist and realistic.

4. China vulture is now in the hands of collectors in Zhang Jiaming, Guangdong Province, which belongs to Huang Longyu species and comes from Nanmu Temple in Zijin, Guangdong Province. This is a natural stone in myths and legends. Its curved beak, sharp eyes and perfect lines look like gods, and with gold and jade, it is the same size as a real eagle. People have to sigh the wonders of nature.

5. "Map of China" A Beijing metropolis daily introduced the strange stone "Map of China" in detail: "A piece of grape agate in the shape of China map is valued at 96 million yuan, which was evaluated at the" China Strange Stone-Grape Agate' China Map' Treasures Appreciation Appraisal Meeting "sponsored by China Geo University and Jade Research Society of China Cultural Relics Society; This piece of grape agate is purplish white with perfect spherical crystals, and its overall shape is very similar to that of China.

6. "The beginning of life" is a strange stone, with a height of 15cm, a width of 13cm and a thickness of 8cm. The stone is exquisite, surrounded by black and white striped frames, and the picture in the frame is a vivid image of an early embryo. The eyes have developed, and other organs and limbs are not obvious. The whole image is like a sleeping baby sitting quietly in its mother's womb. This strange stone is hard, but its surface is very smooth, but it is completely natural. It has not been artificially polished, but it has been washed away by water for a long time.

7. The expert valuation of Blood Silver Carp is HK$ 654.38+65 million.

8. Soul of the Nation On June 65438+1October 65438+April 2008, a Gobi agate stone named Soul of the Nation attracted the attention of many experts and enthusiasts because of its vivid and lifelike portraits of ethnic minorities. The 4th Strange Stone Exhibition lasted 10 days, and gathered more than 300,000 pieces of strange stones from more than 300 exhibitors from more than 20 provinces, autonomous regions and municipalities across China. It is a grand cultural exchange event of strange stones in Beijing.

9. Female heroes. This rock crystal, polished to 46*37* 17mm, is a perfect portrait of an ancient heroine, with all five senses, heroic and lifelike. Nature's uncanny workmanship quickly shocked the strange stone world after its advent.

10. Snow Ape. Nanjing yuhua stone has a reasonable layout, even proportion and clear black and white. Although there are cracks on the surface, the defects can't cover up, and the heavenly work can't be owned by laymen.

The most precious stone is neither diamond nor jade. We have witnessed China1000 billion yuan of strange stones, and also witnessed that ordinary stones should not be underestimated.

What are the four most expensive gems?

The five precious stones in the world are diamond, ruby, emerald and emerald.

What color gem is the most valuable?

In terms of color alone, it is a red diamond. .

How many kinds of gems are there, and which one is the most expensive?

The best and most insoluble. Insoluble things can be bought, but they will dissolve when they are broken.

Which color of gem is the most expensive?

Red, the highest single attribute added.

How many kinds of gems are there, and which one is the most expensive?

Diamonds, red or sapphire, turquoise and other beryls,

Emerald, opal, garnet, spinel, tourmaline, olivine, zircon, topaz, feldspar, Yingshi, jadeite, nephrite, turquoise, lapis lazuli, dushan jade, serpentine jade, malachite, pearl, coral, amber and coal concentrate are all gem-grade. These are common, and there are many kinds of gems that are not common in the market. Anyway, I won't say anything unusual.

Like diamonds, rubies or sapphires and emeralds, these are relatively high-grade gems. The middle and low gears are mostly timely, commonly known as crystals and the like.

There are many kinds of crystals, including purple, white, pink and so on, among which purple is relatively expensive.

In fact, the price cannot be simply determined by the variety. For example, some kinds of jadeite can reach hundreds of thousands or more, while some impurities are almost worthless without aesthetic feeling. Some skilled craftsmen can carve very unique handicrafts according to the characteristics of each material. Maybe a worthless material can turn waste into treasure and become an elusive handicraft.

It's actually complicated. I regret answering your question.

It seems that I can never finish answering and I can't understand it.

Anyway, we can't simply compare two kinds of gems, but we should decide according to the specific gems. Jade can be divided into white jade, jasper, sapphire, jet, topaz, topaz, emerald, Beijing white jade and so on. Geographically, there are Xinjiang jade, Henan jade, xiuyan jade jade (also known as Xinshan jade), Australian jade, dushan jade jade, Southern jade and Canadian jade, among which Xinjiang Hetian jade is a famous specialty in China.

Agate-white, gray, red, blue, green, yellow, sheep liver, gallbladder, chicken blood and black agate. From the pattern, there are: rushes, algae, twisted silk, hawksbill agate and so on. Produced in northeast China, Inner Mongolia, Yunnan and Guangxi. And there is agate with water, called water bile agate.

Stones-turquoise, lapis lazuli, hibiscus stone, wood-changed stone (also known as tiger skin stone), peach stone (also known as golden powder jade), malachite, sapphire, sheep liver stone, tiger eye stone, Dongling stone, etc. Among them, turquoise is a famous product in Yunyang County, Hubei Province, China.

Crystal-crystal, amethyst, topaz, ink crystal, tea crystal (also known as smoke crystal), soft crystal, bristle crystal and hair crystal. It is produced all over China.

Emerald-there are purple, red, gray, yellow, white and other colors, but green is the most expensive. It is a famous specialty of our neighbor Myanmar.

Coral is a benthic coelenterate fossil, red and white, which is produced in Taiwan Province Province, China, with excellent quality.

Beads-pearls (seawater pearls and freshwater pearls) and cultured pearls (seawater pearls and freshwater pearls).

Gems-diamonds, rubies, sapphires, emeralds, aquamarine, cat's eye gems, discolored gems, topaz gems, opals, tourmalines, pointed gems, garnet gems, zircon gems, olive emeralds, emeralds, quartz cat's eyes, feldspar gems, etc.

It is internationally recognized that diamonds are the most expensive gems!