Of course, the growth of gems does not last forever. If the temperature, pressure or composition concentration change during the growth process, the growth of gemstones will stop. When the growth condition is reached at a certain moment, the gem will continue to grow on the original basis, which is called phantom crystal. When a gem grows, it contains the primary crystals of other gems or this gem is the crystal in the crystal.
The growth process of gemstones is the crystallization process of supersaturated liquid. Salt is dissolved in this aqueous solution, and when it is saturated, it will be diluted by cooling the brine. The principle of crystallization is the same. The difference is that one is molten and the other is solution.
Question 2: Where can I find gems along the river beach?
Question 3: Where is the gem mine in China? 1. There are about 100 varieties of gem mineral resources in China, and there are more than 200 gem occurrences, almost all over the country.
The main gem varieties are: diamond, sapphire, ruby, zircon, garnet, aquamarine, tourmaline, olivine, topaz and so on.
However, several valuable gem varieties, such as jadeite, emerald, opal and jadeite, have not yet found valuable deposits.
2. There are 6 metallogenic belts in China Gem Mine.
Eastern coastal gem belt:
From Heilongjiang Province in the north to Hainan Island in the south, it is a region where precious stones are concentrated in China. Such as diamond deposits distributed in Fuxian, Liaoning, Mengyin, Shandong and Yuanjiang, Hunan; Sapphire, zircon and spinel deposits are distributed in Penglai, Hainan, Mingxi, Fujian, Liuhe, Jiangsu, Changle, Shandong, Kuandian and Heilongjiang. Besides, Xiuyu is also produced in this area.
B Tianshan-Altai gem belt:
Gems are mainly produced in pegmatite, and the most famous is pegmatite gem deposit in Altai, Xinjiang, which is rich in aquamarine, colored tourmaline, topaz and crystal.
Gem belts in Yinshan and its marginal areas;
Granite pegmatite, chronological vein and hydrothermal alteration zone controlled by east-west structure are also the main parts of gem production.
Especially aquamarine, garnet, green tourmaline, crystal, etc. Wrestling Tiger pegmatite, hibiscus stone, amethyst and crystal in Inner Mongolia. In Wulashan, bloodstone is in Bahrain Right Banner.
D. Kunlun-Qilian Mountain Gem Belt:
The famous nephrite in Hotan, Xinjiang and the jade in Qilian, Gansu are both produced here.
East Himalayan gem belt:
There are many precious stones in Yunnan, such as topaz, aquamarine, emerald, ruby and cassiterite.
Yunnan is one of the important gem producing areas and trading areas in China.
F Qinling gem belt:
Dushan jade and Miyu in Henan, especially the turquoise in Yunyang, Hubei, are world-famous jade varieties.
Malachite in Tonglushan, Hubei Province is also well-known in China.
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Excerpt from Geoscience Forum-China Geoscience Forum > Jewelry and Jade > World Gem Distribution.
Question 4: Where was the gem found? What kind of gem are you asking? There are places where precious stones are mined all over the world.
Question 5: Do you want to know what is the most common gem? What kinds of gems are there?
At first, all the gem materials used by people came from nature, which gave the gem natural attributes. However, due to the scarcity and high price of natural gemstones, with the continuous progress of human science and technology, a large number of artificial products have entered the jewelry market and become an inseparable part of the gemstone field. Therefore, in the national standard issued by 1997, gems are defined as "natural gems and artificial products".
First, according to the classification of gemstones.
1, natural jewelry and jade: divided into-natural gemstones-natural jade-natural organic gemstones.
2. Man-made products: divided into-synthetic gems-artificial gem-assembled gems-recreated gems.
Jewellery jade
It is the general name of natural jewelry, jade and man-made products, referred to as gem.
Natural jewellery jade
Natural jewelry and jade are beautiful, durable, rare, with craft value and can be processed into decorations.
Include natural gemstones, natural jade and natural organic gemstones.
Natural gemstone
A mineral single crystal (including twins) produced in nature is beautiful, durable and rare, and can be processed into decorations.
For example: diamonds, rubies, sapphires, emeralds, crystals, garnets, tourmalines, aquamarine, etc.
Natural jade
Naturally occurring minerals are beautiful, durable, rare and of scientific and technological value, and a few are amorphous.
Examples: jadeite, nephrite, jadeite, turquoise, dushan jade, opal, etc.
Natural organic gemstone
Produced by natural organisms, partially or completely composed of organic matter, the solid that can be used for decoration is natural organic gemstone, and cultured pearls also belong to this category.
For example: pearls, corals, ivory, amber, etc.
imitation jewel
All or part of the materials used as jewelry and decorations are produced or manufactured by people, collectively referred to as artificial products.
Including synthetic gemstones, artificial gem, divided gemstones and reconstructed gemstones.
synthetic gem
Completely or partially artificially made crystals or amorphous bodies with known counterparts in nature have basically the same physical properties, chemical composition and crystal structure as the corresponding natural jewels and jade.
For example: synthetic rubies, synthetic emeralds, synthetic diamonds, synthetic opals, etc.
imitation jewellery
Artificial gem is an artificial crystal or amorphous body, and there is no known counterpart in nature.
For example: glass, plastic, artificial yttrium aluminum garnet, etc.
complex stone veneer
Jewelry and jade, which is composed of two or more pieces of materials and gives people an overall impression, is called split stone, or "split stone" for short.
Examples: mosaic opal, sapphire synthetic sapphire mosaic stone, etc.
Reconstructed stone
By manual means, the fragments or chips of natural jewelry and jade are welded or pressed into a whole jewelry and jade.
Example: recycling amber, recycling turquoise, etc.
Imitation gems are used to imitate the color, appearance and special optical effects of natural jewelry and jade, and belong to artificial products.
Second, according to the gem value classification
High-grade gem diamonds, rubies, sapphires, emeralds, cat's eyes, jadeite, nephrite, etc.
Mid-range gemstones include aquamarine, tourmaline, spinel and andalusite.
Low-grade gem crystal, garnet, agate, tiger eye stone, Dongling stone, etc.
This is a general classification in business. In fact, there are many factors that affect the value of gems.
People often say that "gems and diamonds" are the same thing?
As can be seen from the above classification, there are many kinds of gems, and diamonds are just one of them. In other words, diamonds can be called gems, but they can't be called that if they are subdivided. ...& gt& gt
Question 6: Where do gems usually appear? Or what rocks and landforms? What are the characteristics? Will Danxia landform appear? Geomorphology has no effect on the appearance of gems. Because the landform was shaped by external forces in the later period. The key lies in the rock formation, and there are usually gems in metamorphic rocks.
Question 7: Where do the rough stones of precious stones usually appear? Different gems have different geological structures. It's hard for you to understand without studying geology.
Question 8: Where can I find gems in China? Which county in Shandong was reported by CCTV, I forgot. Please check it carefully.
Question 9: Where is the main origin of sapphire? Where is the best quality gem? Most high-quality sapphires are concentrated in Asia.
There are not many sapphire producing areas in the world, mainly Myanmar, Sri Lanka, Haiti, Australia, Denmark and China, but in terms of gem quality, Myanmar and Sri Lanka are the best.
Sapphire produced in Kashmir and Myanmar on the border of India, Pakistan and Sri Lanka is recognized as the most beautiful and valuable in the gem industry. The mining area of Kashmir sapphire is located at the northwest end of the Himalayas, with an altitude of more than 5,000 meters, above the snow line. The mining conditions are very difficult, so the output has been very low.
Sapphire from Myanmar is also very valuable, ranging in color from rich sapphire to deep cornflower blue, showing bright pure blue to bright blue with purple.
The high-quality sapphire produced in these two places can cost hundreds of thousands or even millions of RMB per carat.
Sapphires from Sri Lanka and Madagascar are also very popular. They have bright luster and moderate blue. Most of the sapphires we saw in shopping malls were produced in these two countries. In addition, during this period, sapphire's reputation in Cambodia has also increased day by day because of its too bright blue color.
In addition, China Shandong Changle also produces sapphires. Although the particle size is large and the purity is high, it is not as good as other famous sapphire producing areas in the world because of its beautiful color and deep tone.
Excerpt from Anne's fashion gem class
Question 10: Where is the gem capital of the world? There are two, one is Burstein, a small town in Reinland-Filch, southern Federal Republic of Germany, and the other is Burstein, a small town in southern Federal Republic of Germany, Wuzhou, Guangxi, China. With a population of only 38,000, there is nothing strange about the scenery, but it enjoys a lot of fame in the West and is known as the "Gem Capital". In this small town just a few miles from Fiona Fang, more than 65,438+0,000 families actually run more than 600 large and small gem workshops. Every year, all kinds of gems from 60 countries are carefully carved here and exported to 130 countries and regions in the world. Burstein was originally an unknown small village. More than 500 years ago, agate, amethyst, jasper and other rich and precious minerals were found in the nearby mountains, so all the men, women and children in the village made a living by mining precious stones. At first, people here sold all kinds of original gems mined directly to businessmen; Since 1540, local gem workshops have appeared in Burstein. The pure gemstones and skilled craftsmen here have brought reputation and prosperity to Burstein. However, after Burstein, as one of the European gem mining and processing centers, developed smoothly for more than 400 years, at the beginning of the19th century, a thick cloud hung over the hearts of Burstein people: Burstein's mining dried up, and the source of wealth finally dried up. Craftsmen with unique skills had to make a living, and many villagers went to various countries in the United States. Burstein people have endless attachment to their homeland. A group of villagers living in Boorstein, Brazil, found the gems locally and immediately transported the newly mined gems back to their hometown. As a result, skilled craftsmen returned to their homeland from all over the world and returned to their old jobs. Burstein, once in decline and depression, has regained its former vitality. In order to ensure that the art of gem processing is always at the forefront, Mr. Burstein established a college of gem processing technology. Children have been honing their skills in technical schools since they received primary education. Their teachers are all famous masters who enjoy the reputation of masters. Of course, students are not processing expensive gems, but cheap potatoes. In order to live up to the reputation of "Gem Capital", the people of Austria and Boorstein have established an information network connecting the world's major gem producing countries and trading markets. Now, the news that gems have been mined in the world can reach Burstein through the information network within a few hours. 1967, a large gemstone was mined in Tanzania, and the people of Boorstein won the honor of naming the gemstone. Mr Burstein is becoming more and more famous, and many tourists come here. In order to let people know about past lives where gems are mined and processed, Mr. Burstein established a gem museum. There are many rare treasures here, and there are imitations of all the most precious stones in the world. In order to let tourists know the history of Burstein, the gem processing workshop hundreds of years ago has been restored and preserved in the city. Hundreds of years ago, the underground mines where Burstein people mined precious stones were also open to tourists. Wuzhou's artificial products industry started in the early 1980s. At present, there are more than 250 enterprises registered in Wuzhou to operate artificial gem. At present, there are nearly 654.38+million people engaged in the processing industry in artificial gem, and the total amount of precious stones processed each year exceeds 6 billion. The output of artificial products has accounted for 80% of China's total output and more than 40% of the world's total output. Businessmen from Italian, Mexican, Russian, Saudi Arabia, Thailand, Hongkong and Taiwan Province provinces have set up factories or purchasing points in Wuhan. There are tens of thousands of artificial products produced, which appear in famous jewelry exhibitions all over the world from time to time. Man-made products have developed from the initial processing to direct sales to all parts of the world, participating in international market competition. Wuzhou has become the world's largest processing base and trading center in artificial gem, and can be called "the world's man-made products capital". In 2004, Wuzhou compiled and implemented the first product standard about artificial gem in China, and established the first artificial gem testing center in China. At present, Wuzhou's main artificial products trading center is located in Bubugao Road and West Ring Road. Among them, Wuzhou Gem City is the largest professional trading center of modern gem ornaments in China and even Southeast Asia, and also the trading center of antiques, gold and silver ornaments and tourist commodities. Wuzhou Gem City is located at the top of the West Ring Road. Covering an area of 2 1998 square meters, the building area is 39,998 square meters, including 25,000 square meters of commercial area and 500 shops. It is the largest professional trading center of modern gemstone ornaments in China and even Southeast Asia, and it is also a rare stone antique, gold and silver ornaments and tourist commodities ...