Chalcedony, from the literal point of view, will be considered the essence of jade, that is, high-quality jade, in fact, otherwise, the two varieties are different, the difference is very large, can not be confused. So, how to distinguish what is Yu and what is chalcedony? Here is a brief introduction to the difference between chalcedony and jade.
First, we need to figure out the definition of both. Chalcedony belongs to "jade" but does not belong to "jade". Hyundai divides "jade" into two categories: jadeite and nephrite. Jadeite is jadeite, and jadeite mainly refers to Xinjiang jadeite (ie Hetian jade). The concept of "Jade" is much larger than "Jade". Hetian jade, jade, crystal, amber, agate, coral, etc. are all jade, and chalcedony is one of jade.
Secondly, the composition of chalcedony and jade is different, which is an important reason for the difference between the two. The main components of jade are calcium magnesium silicate; the main component of chalcedony is silica (SiO2), which is a collection of cryptocrystalline quartz. In this way, they are not the same type of substance.
In jade, Dongling stone, dense jade, jasper, etc., which are easily confused with chalcedony, can be distinguished from the texture. The texture of chalcedony has a cryptocrystalline structure, and the particles are tiny and cannot be seen by the naked eye. The granules of Dongling Stone, Miyu and Jasper are large, and the texture is coarse and rough relative to chalcedony. There are many kinds of jade, I chose jade and chalcedony for comparison.
Green chalcedony and jade
The surface of the green chalcedony is bright and delicate. The color is usually apple green, which can be seen in varying degrees of depth and translucency. The green chalcedony is brittle and will fade when heated or exposed to sunlight. The green jade has a variegated interwoven structure, and it can be seen as a patchy or fibrous jadeite crystal. The appearance is glassy, ​​mostly translucent or transparent, and the emerald color is pure and pure. In terms of weight, the green chalcedony with a specific gravity of 2.60 is much lighter than the jade with a specific gravity of 3.24 to 3.43.
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