The formation of agate mostly comes from volcanic eruption hundreds of millions of years ago. Both volcanic and sedimentary rocks can form agate. How is agate formed? /kloc-0.0 million years ago, due to the volcanic eruption of crustal movement, hot basaltic slurry quickly rushed out of the ground and formed bubbles of different sizes and shapes when it was cold. After the volcanic eruption stopped, magma formed rocks and bubbles formed cavities. The volcano erupts again or the silicic acid solution containing silicon dioxide in the volcano climbs up the cracks in the rock under pressure to fill the cavity. With the cooling of magma, it precipitates and crystallizes over the years, which is comprehensively reflected with minerals such as iron, manganese and cobalt. Due to the crustal movement, magma flows upward. How did agate form? When it rises to a certain height, it will encounter groundwater. When water meets hot rock flow, it will form a gas-liquid mixture, and bubbles will form in the rock flow. These bubbles are different in size, sparsity and shape. As the magma rises again, the bubbles in the rock flow become bigger and swear to roll. When the magma reaches a certain height and no longer flows, bubbles will also be located. At this time, the shape of the bubble will not change. With the cooling of temperature, the outermost layer of silicon dioxide gradually forms a thin agate shell, which is opaque, dense and hard. The shell contains gas, liquid and silica gel. The silica colloid is cooled again to form chalcedony, which is distributed on the inner wall of the shell. At this time, agate with light particles appears black bands, brown bands with manganese oxide and pale white or light gray bands with calcium and magnesium in the gas mixture. These minerals containing pigment ions crystallize in turn according to different temperatures, thus forming textured agates with distinct layers and different colors. There are so many gases and liquids that water can't run out. They are enclosed in cavities in agate and transformed into water bile agate. How is agate formed? Agate is formed because of the division of hot magma and external environment, and the structure after formation is different. Layered agate is uniform in texture, hollow and solid, generally translucent to opaque, with hardness of 6.5 to 7 degrees, specific gravity of 2.55 to 2.9 1, and refractive index of 1.535 to 1.55. Agate can be formed in all strata of geological history, whether igneous or sedimentary. So there are many agates. Agate is widely distributed in China, almost all provinces, mainly in Heilongjiang, Liaoning, Hubei and other regions. It is also rich in Europe, North America and Southeast Asia in the world, and the most famous producing areas in the world are India and Brazil. Agate is mainly produced in cracks and caves of volcanic rocks and also in sedimentary rocks. It is a colloidal condensate of silicon dioxide. Like crystal and jasper, agate is also a timely mineral, and its chemical composition is also silica. Its hardness exceeds that of crystal. Agate itself has the characteristics of hardness, compactness, delicacy, various shapes, high smoothness, gorgeous color and rich colors. It is the first-class material for carving handicrafts. The combination of advanced technology and perfect art by craftsmen endows it with unique ideas, rich themes, ingenious design and exquisite carving skills. Make its artistic effect extraordinary. There is a mantra in the jewelry industry-agate is poor without red. This shows how important the red color of agate is. In fact, the color of agate is rich and varied, but red is the main color in agate. Because there are few natural red agates and the color layer is not deep, the red color in agate is mostly burnt red agate. Its red colors are Zhen Hong, purplish red, crimson, brownish red, sauce red and yellow red. In addition, red agate is called brocade agate, and red and white agate is called brocade agate or safflower agate. For jade carving products, the size of the block is larger, and for jewelry inlaid with gems, the aesthetic feeling of color is better.