Nowadays, more and more people are beginning to play antiques. Jade is deeply sought after by the vast number of Tibetans with its unique texture. Some of the problems that followed have confused the Tibetans. What is the difference between agate and chalcedony, agate is what? What is chalcedony? Follow the fun now and follow the Xiaobian to find out!
The English name of the agate is Agate, the name of the Latin Sicilian Rive Achates, the first place in Italy (the Diophora period) Theophrastus found agate. The word agate comes from the Buddhist scriptures, and the Sanskrit is called "Asma Gapo", which means "horse brain." The term agate is used earlier in China. The English name for chalcedony is Chalcedony.
The chemical composition is mainly SiO2, and often contains trace elements such as iron, manganese, nickel and the like.
Refractive index: 1.54-1.55
Hardness: 7
Density: 2.61-2.65g/cm3
Origin: Brazil, China, India, USA, Russia, Iceland
Agate is a variant of quartz, a type of cryptocrystalline quartz deposited from silicon dioxide. From the cut section, concentric, corrugated, layered or parallel strips of various colors such as ash, white, red, green, light brown, and light blue can be seen. There is a saying that "a thousand kinds of agates are all kinds of jade". In the gem world, the cryptocrystalline block quartz with concentric layered and irregular strips and entangled structure is called agate.
It is said that it can bring happiness and confidence to the wearer, and is endowed with the kindness of God, and can also ensure their victory and strength. The Shaharia, the earliest resident of the Mesopotamia region of Egypt, seems to be the first to use agate as a token, ring, beaded, stamp and other gemstone art. Their agate crafts made from agate are now stored in New York. In the National Museum of American History. The most exotic agate product is a wine cup with two handles, more than a pint. The appearance of the cup is intricately engraved with the pattern of the gods Bakus. According to historical records, this cup was made for the Roman Emperor Nero, and after many people owned and preserved, it finally became the cup used by the French King's Coronation, which the French considered to be one of the most valuable souvenirs in history.
agate
Agate occurs in hydrothermal deposits, volcanic rock fissures and cavities in the base volcanic period. The origin of the green chalcedony has a view that it is the result of hydrothermal action after the volcanic period. There are many world famous agate producing areas, Brazil and China, Yunnan, red agate, large agate, India, American moss, agate, Russia, Iceland, India, the United States, China, gray agate. China is a big agate country. The world's fine green chalcedony is produced in Australia, Queensland, Sri Lanka, India and other countries.
Both agate and chalcedony are cryptocrystalline quartz, which is collectively called chalcedony. In the gem world, the quartz crystal structure is called agate, and if the block has no grain structure, it is called chalcedony. The crystal form is cryptocrystalline, with granular and fibrous structures. The aggregates are often stalactite, kidney-like, tuberculous, and dense. Agate has a strip of stripes in a variety of colors. The agate and chalcedony are pure white. Because the pigment ions and impurities make the agate color very rich, there are “a thousand kinds of agate 10,000 kinds of jadeâ€, the color is red, blue, green, green, yellow, brown, purple , gray, black and other colors, and have a concentric, layered, corrugated, striated pattern. Grease to gloss, transparent to translucent. No cleavage, shell-like fracture, crack.
The difference between agate and chalcedony and similar jade. Agate and chalcedony can be distinguished by different colors, stripes and other patterns. Chalcedony products are easily confused with Dongling stone, dense jade, jasper, etc., and can be distinguished according to differences in color, texture and density. The chalcedony product has a bright, cryptocrystalline structure with a fine texture. The quartzite particles such as Dongling Stone are coarse and fine-grained, and the texture is relatively rough. Jade similar to green chalcedony has green jade, turquoise, and Tianhe stone. The green jade plaque interweave structure, visible phenocryst or fibrous jadeite crystal. Turquoise transparency is poor, porcelain gloss, low hardness, 5-6. Tianhe stone has obvious lattice-like stripes.
Evaluation and purchase of agate and chalcedony. According to the morphological characteristics, agate can be divided into the following varieties: onyx (with a branch of agate and agate), red onyx, moss agate (also known as denture agate), landscape agate (also known as agate agate), Fire agate, water agate. The famous Nanjing "Huahua Stone" is a kind of agate with a concentric structure. The evaluation and purchase factors of agate are color, transparency and blockiness. The process requirements are bright, pure, thick color layer; smooth surface, high transparency; uniform and clear texture, good linearity; fine texture, toughness; no cracks or cracks; Red and blue are the best. Chalcedony varieties: green chalcedony (also known as Australian jade, also known as Inka stone in China), thick green chalcedony, Bi Shi, blood chalcedony (also known as bloodstone). The color of chalcedony is pure and beautiful, and the bigger the block, the better. The quality of green chalcedony and green chalcedony is the most precious. The chalcedony is processed into jewelry such as ring faces, bracelets and necklaces.
Agate has been a popular mid-range jade since ancient times. The world's famous agate gemstone jewelry is too numerous to mention. Around 4,000 BC, the Egyptian Shamirians used agate to make an axe-like craft, which is now in the New York Museum of History. China's largest piece of water-breasted agate art – Daguanyuan, weighing 7350 grams, with a volume of more than 1,100 cubic centimeters and 850 grams of water. The water bladder is wrapped in agate formation, extremely precious and rare. Many countries regard the stalking onyx and olivine as the "birthstone of August". Westerners think that wearing it symbolizes husband and wife, love, happiness, and is known as the "stone of happiness."
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