Twilight Jade Knowledge: Enhance the color of jade by high temperature heat treatment. Some low-grade jadeites with a yellow-brown tone will be heated at a high temperature of about 200 degrees Celsius to make the emerald yellow-brown part turn red to obtain a higher value red dragonfly. The principle of ochre is that during the high temperature treatment, the water in the limonite will evaporate, and the vermillion hematite is naturally formed.
In terms of the formation mechanism, the red dragonfly that is drawn out is almost identical to the red dragonfly formed in nature, and it is difficult to distinguish the two. According to the National Standard for Jewelry and Jade, heat-treated gemstones are included in natural gemstones and the like. Therefore, the certificate issued by the professional jade identification agency will not be specifically marked as a jadeite, which is directly regarded as a natural A-car jade. However, the artificially treated jade is still less valuable than natural jade.
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