Emerald refers to the emerald green beryl with chromium. The chemical composition is strontium silicate. The crystal is hexagonal column and belongs to the hexagonal system. It is green or dark green, with a specific gravity of 2.6-2.8 and a hardness of 7.5-8. , easy to break; transparent, glass luster. The color is beautiful, transparent and hard, which is a valuable feature in emeralds. Its main producing areas are Colombia and the former Soviet Union. Emeralds are often used as accessories such as ring faces, earrings, and boutonniere.
The emerald green comes from the chrome ions inside it, which can be observed by Charles filter. Under the Charles filter, most of the emeralds appear dark red due to the presence of chromium ions, while other green substitutes are mostly dark green. This rule can only be used as a reference for identification. It cannot be used to determine the authenticity, because some African-made emeralds are not red under the color filter. On the contrary, some artificial emeralds have a strong red color.
The emerald is a family of beryl, which is a hexagonal system. Crystals are often hexagonal, with few facets. There are pits on the cylinder and bottom surface.
Due to the formation of the rock that is often subjected to stress extrusion, the appearance of the emerald crystal is almost broken, and there are many inclusions. The crystal integrity is extremely rare. The green color of emeralds is not the same as the color of other natural emeralds, and its rich inclusions can be distinguished by more experienced people.
Color characteristics
The color of emerald is very attractive. Some people describe it with spinach green, green onion, and green bud green, but they can't accurately express its color. It has a yellowish green color, and it seems to have a little blue. Even the spectrum seems to be missing the dot wavelength. It is one of the gemstones that can never be seen. Whether it's cloudy or sunny, whether it's an artificial light source or a natural light source, it always glows softly and radiantly. This is the king of green gems - the charm of emeralds.
Emerald is a gem-quality green beryl. The green color should reach medium to reach a rich green tone, that is, the concentration of the color should be relatively saturated. Light green is often referred to as green beryl.
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