West Asian And The Middle East Commodity Market

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How are agates formed? - 9 meters looks

These types of reserves are found in young volcanic areas (Mesozoic – Cenozoic) of folded belts and to a lesser extent in old platforms, and economic reserves along with andesite - porphyries, andesite - basalt porous porphyries and their tuffs

Agates typically form in cavities or voids within volcanic rocks or other host rocks

Agates typically form in cavities or voids within volcanic Rocks or other host rocks. These cavities can be the result of gas bubbles, vesicles, or cracks formed during the cooling and solidification of lava or other geological processes. Over time, groundwater rich in dissolved silica (silicon dioxide) seeps into these cavities. The source of silica can be volcanic ash, mineral-rich water, or other geological sources. The silica-rich fluids slowly fill the voids, depositing layers of microscopic quartz crystals.

As the silica-rich fluids come into contact with the cavity walls, they begin to cool and the dissolved silica starts to precipitate. The silica molecules arrange themselves in an ordered pattern and slowly grow as tiny crystals, forming a layer on the inner surface of the cavity. This process occurs over an extended period, with layer upon layer of silica being deposited. During the formation of agate, mineral impurities present in the silica-rich fluids can influence the color and pattern of the stone. These impurities may include iron oxides, manganese oxides, chromium, and other trace elements. The variations in mineral impurities contribute to the distinctive bands and patterns seen in agates.

After the Agate is fully formed, it may undergo additional geological processes, such as erosion, weathering, and exposure to groundwater. These processes can alter the appearance of agates, leading to the development of features like hollow centers, fractures, or the infiltration of other minerals, resulting in agate geodes or fortification agates.

In general, agate can be sourced from silica Minerals or hydrothermal fluids, or in other cases from amorphous silica gel or hydrothermal fluids (hydrothermal fluids) or atmospheric waters. Agate is found in various geological environments in gas cavities, in acidic volcanic rocks, and Fossil Rock fractures. Most believe that the formation of agate coincides with the formation of its source, but some believe that the formation of agate is its source millions of years after the formation of stone.

Large amounts of agate deposits are formed from the effect of post-volcanic hydrothermal solutions on basalts and andesite. These types of reserves are found in young volcanic areas (Mesozoic – Cenozoic) of folded belts and to a lesser extent in old platforms, and economic reserves along with andesite - porphyries, andesite - basalt porous porphyries and their tuffs. Erosion of these types of reserves results in agate-rich placers. Agate volcanic hydrothermal deposits are sometimes formed in acidic volcanic rocks. These types of reserves are oval and have an uneven surface. This type of cross agate reserves 15 - 1 cm and sometimes 30 cm, and in exceptional cases to 1.2 to 0.9 meters looks. Stone cover silicified rhyolite was approximately 25-50%of the rock mass will form. The cavities in the cover stone are partially or filled with agate.

The deposition of layers continues, resulting in the characteristic banding patterns of agate. These bands can vary in thickness, color, and transparency, creating the unique and intricate patterns that are highly prized in agate stones. The banding is a result of changing conditions during the formation process, such as variations in temperature, pressure, and mineral content. Over time, the layers of silica crystals gradually solidify and harden. The process of solidification can take thousands or even millions of years, as the layers build up and the silica transforms into a compact, microcrystalline form of quartz known as chalcedony.

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