The difference between jadeite and agate:
1. Definition of substance:
The correct definition of jadeite is fibrous aggregate composed of pyroxene minerals mainly composed of jadeite minerals, which is a stony polycrystalline aggregate that reaches the jade level under geological action. Agate is a kind of banded block mixed with opal and aphanitic, which is often dense and forms various structures.
2. Material composition:
Jadeite is mainly composed of jadeite or jadeite, sodium (sodalite) and sodalite (omphacite), and may also contain amphibole, feldspar, chromite and limonite. The main component of agate is silica, because it alternates with hydrated silica (silicic acid), so it is often layered repeatedly. Because it is mixed with oxidized metal, the color can range from extremely light to dark.
3. Shape of material:
The original jadeite stone can be as long as 18 feet (about 5.5 meters) and its weight may reach 37 tons, forming a huge stone shape. Agate has breast shape, grape shape, tuberculosis shape and so on. The common structure is concentric circles. Chalcedony has different colors, usually green, red, yellow, brown, white and so on.
4. Gloss of matter
Emerald is glassy, translucent or transparent. Emerald appears in various colors because it contains different dye ions: usually white, red, green and purple. Yellow, pink, etc. Pure without impurities is white, and if it contains chromium, it is soft and gorgeous light green and dark green, which is called Cui.
Natural agate has the appearance of glass and oily luster, bright natural patterns, natural and pure colors, smooth and moist. The texture is natural and smooth, and the most important thing is that agate has gradient color, clear color, strong layering and obvious stripes.
5. Material texture:
Red agate jewelry is the most expensive. If you choose an agate necklace, you should pay attention to the consistency of each bead color, no noise, the bead size should be appropriate and the smoothness should be good. Then, lift the necklace to see if it is vertical and if each bead is hung on a line. If the necklace is bent, it means that the processing technology is rough.
Natural jadeite is only carved, polished and polished by physical methods, and its internal structure has not been improved by any chemical or irradiation methods. In order to add color to the color root, it is particularly important to note that this kind of jade color bar has no fluorescence reaction and does not change its specific gravity.